Fix for parsing errors when using "empty" definitions nested

[Knoblul]

When writing something like this

#define FOO
#define BAR FOO

IntelliJ constantly encounters the following errors:

Stacktrace

``` java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0 at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) at java.base/java.util.Objects.checkIndex(Objects.java:359) at java.base/java.util.ArrayList.get(ArrayList.java:427) at glslplugin.lang.parser.PreprocessorPsiBuilderAdapter.getTokenType(PreprocessorPsiBuilderAdapter.java:264) at glslplugin.lang.parser.GLSLParsingBase.getTokenType(GLSLParsingBase.java:108) at glslplugin.lang.parser.GLSLParsing.parsePreprocessor(GLSLParsing.java:272) at glslplugin.lang.parser.GLSLParsingBase.flushPreprocessor(GLSLParsingBase.java:62) at glslplugin.lang.parser.GLSLParsingBase.eof(GLSLParsingBase.java:76) at glslplugin.lang.parser.GLSLParsing.parseTranslationUnit(GLSLParsing.java:352) at glslplugin.lang.parser.GLSLParser.parse(GLSLParser.java:48) at com.intellij.psi.tree.ILazyParseableElementType.doParseContents(ILazyParseableElementType.java:58) at com.intellij.psi.tree.IFileElementType.parseContents(IFileElementType.java:53) at com.intellij.psi.impl.source.tree.LazyParseableElement.lambda$ensureParsed$2(LazyParseableElement.java:175) at com.intellij.psi.impl.DebugUtil.performPsiModification(DebugUtil.java:481) at com.intellij.psi.impl.source.tree.LazyParseableElement.ensureParsed(LazyParseableElement.java:174) at com.intellij.psi.impl.source.tree.LazyParseableElement.getFirstChildNode(LazyParseableElement.java:226) at com.intellij.psi.impl.source.tree.LazyParseableElement.getFirstChildNode(LazyParseableElement.java:24) at com.intellij.psi.impl.BlockSupportImpl.isReplaceWholeNode(BlockSupportImpl.java:418) at com.intellij.psi.impl.BlockSupportImpl.mergeTrees(BlockSupportImpl.java:365) at com.intellij.psi.impl.BlockSupportImpl.makeFullParse(BlockSupportImpl.java:297) at com.intellij.psi.impl.BlockSupportImpl.reparse(BlockSupportImpl.java:92) at com.intellij.psi.impl.DocumentCommitThread.doCommit(DocumentCommitThread.java:261) at com.intellij.psi.impl.DocumentCommitThread.commitUnderProgress(DocumentCommitThread.java:128) at com.intellij.psi.impl.DocumentCommitThread.commitSynchronously(DocumentCommitThread.java:97) at com.intellij.psi.impl.PsiDocumentManagerBase.lambda$doCommit$9(PsiDocumentManagerBase.java:492) at com.intellij.psi.impl.PsiDocumentManagerBase.executeInsideCommit(PsiDocumentManagerBase.java:507) at com.intellij.psi.impl.PsiDocumentManagerBase.doCommit(PsiDocumentManagerBase.java:492) at com.intellij.psi.impl.PsiDocumentManagerBase.lambda$doCommit$8(PsiDocumentManagerBase.java:481) at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1023) at com.intellij.psi.impl.PsiDocumentManagerBase.doCommit(PsiDocumentManagerBase.java:481) at com.intellij.psi.impl.PsiDocumentManagerBase.commitDocument(PsiDocumentManagerBase.java:330) at com.intellij.psi.impl.source.codeStyle.lineIndent.FormatterBasedLineIndentProvider.getLineIndent(FormatterBasedLineIndentProvider.java:39) at com.intellij.application.options.CodeStyle.getLineIndent(CodeStyle.java:446) at com.intellij.codeInsight.editorActions.EnterHandler.adjustLineIndentNoCommit(EnterHandler.java:311) at com.intellij.codeInsight.editorActions.EnterHandler$DoEnterAction.run(EnterHandler.java:436) at com.intellij.codeInsight.editorActions.EnterHandler.executeWriteActionInner(EnterHandler.java:162) at com.intellij.codeInsight.editorActions.EnterHandler.lambda$executeWriteAction$0(EnterHandler.java:64) at com.intellij.psi.impl.source.PostprocessReformattingAspect.lambda$disablePostprocessFormattingInside$2(PostprocessReformattingAspect.java:120) at com.intellij.psi.impl.source.PostprocessReformattingAspect.disablePostprocessFormattingInside(PostprocessReformattingAspect.java:128) at com.intellij.psi.impl.source.PostprocessReformattingAspect.disablePostprocessFormattingInside(PostprocessReformattingAspect.java:119) at com.intellij.codeInsight.editorActions.EnterHandler.executeWriteAction(EnterHandler.java:63) at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler$1.run(EditorWriteActionHandler.java:52) at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1023) at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler.doExecute(EditorWriteActionHandler.java:66) at com.intellij.openapi.editor.actionSystem.EditorActionHandler.execute(EditorActionHandler.java:202) at com.intellij.codeInsight.template.impl.editorActions.EnterHandler.executeWriteAction(EnterHandler.java:49) at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler$1.run(EditorWriteActionHandler.java:52) at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1023) at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler.doExecute(EditorWriteActionHandler.java:66) at com.intellij.openapi.editor.actionSystem.EditorActionHandler.lambda$execute$2(EditorActionHandler.java:192) at com.intellij.openapi.editor.actionSystem.EditorActionHandler.doIfEnabled(EditorActionHandler.java:89) at com.intellij.openapi.editor.actionSystem.EditorActionHandler.lambda$execute$3(EditorActionHandler.java:191) at com.intellij.openapi.editor.impl.CaretModelImpl.lambda$runForEachCaret$3(CaretModelImpl.java:312) at com.intellij.openapi.editor.impl.CaretModelImpl.doWithCaretMerging(CaretModelImpl.java:421) at com.intellij.openapi.editor.impl.CaretModelImpl.runForEachCaret(CaretModelImpl.java:321) at com.intellij.openapi.editor.impl.CaretModelImpl.runForEachCaret(CaretModelImpl.java:296) at com.intellij.openapi.editor.actionSystem.EditorActionHandler.execute(EditorActionHandler.java:189) at com.intellij.xdebugger.impl.actions.handlers.XDebuggerSmartStepIntoHandler$SmartStepEditorActionHandler.doExecute(XDebuggerSmartStepIntoHandler.java:417) at com.intellij.openapi.editor.actionSystem.DynamicEditorActionHandler.doExecute(DynamicEditorActionHandler.java:63) at com.intellij.openapi.editor.actionSystem.EditorActionHandler.lambda$execute$4(EditorActionHandler.java:199) at com.intellij.openapi.editor.actionSystem.EditorActionHandler.doIfEnabled(EditorActionHandler.java:89) at com.intellij.openapi.editor.actionSystem.EditorActionHandler.execute(EditorActionHandler.java:198) at com.intellij.openapi.editor.actionSystem.EditorAction.lambda$actionPerformed$0(EditorAction.java:93) at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:219) at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:174) at com.intellij.openapi.editor.actionSystem.EditorAction.actionPerformed(EditorAction.java:102) at com.intellij.openapi.editor.actionSystem.EditorAction.actionPerformed(EditorAction.java:77) at com.intellij.openapi.actionSystem.ex.ActionUtil.doPerformActionOrShowPopup(ActionUtil.java:315) at com.intellij.openapi.keymap.impl.ActionProcessor.performAction(ActionProcessor.java:47) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher$1.performAction(IdeKeyEventDispatcher.java:595) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.lambda$doPerformActionInner$9(IdeKeyEventDispatcher.java:717) at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:105) at com.intellij.openapi.application.TransactionGuardImpl.performUserActivity(TransactionGuardImpl.java:94) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.lambda$doPerformActionInner$10(IdeKeyEventDispatcher.java:717) at com.intellij.openapi.actionSystem.ex.ActionUtil.performDumbAwareWithCallbacks(ActionUtil.java:337) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.doPerformActionInner(IdeKeyEventDispatcher.java:714) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:658) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:606) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processActionOrWaitSecondStroke(IdeKeyEventDispatcher.java:489) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.inInitState(IdeKeyEventDispatcher.java:478) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:229) at com.intellij.ide.IdeEventQueue.dispatchKeyEvent(IdeEventQueue.java:824) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:760) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:450) at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:791) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:449) at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:113) at com.intellij.ide.IdeEventQueue.performActivity(IdeEventQueue.java:624) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:447) at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:881) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:493) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105) at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92) ```