crash on app start up

[sds100]

Developer TODO (don't remove)

• [ ] create new branch. put issue number at start of name if not a very quick fix.
• [ ] write tests. put issue number in comment
• [ ] update documentation
• [ ] squash and merge
• [ ] delete branch

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Describe the bug App crashes on start up. The person is using Android 8.1

06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime: FATAL EXCEPTION: main
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime: Process: io.github.sds100.keymapper.ci, PID: 7687
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at java.util.ArrayList.get(ArrayList.java:437)
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at com.github.appintro.internal.viewpager.PagerAdapter.getItem(PagerAdapter.kt:13)
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at com.github.appintro.AppIntroBase$onPostCreate$1.run(AppIntroBase.kt:458)
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at android.os.Handler.handleCallback(Handler.java:809)
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at android.os.Handler.dispatchMessage(Handler.java:102)
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at android.os.Looper.loop(Looper.java:166)
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at android.app.ActivityThread.main(ActivityThread.java:7555)
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at java.lang.reflect.Method.invoke(Native Method)
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:469)
06-23 01:59:35.837 10789  7687  7687 E AndroidRuntime:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:963)

[sds100]

fixed