Fixes a few issues found by @bismurphy where certain symbols that were not supposed to be added, were added.
The major fix is when the second pass found a meaningful symbol name like MakeExplosion, the third pass could add a new symbol with the same offset but with the default splat name func_8019055C. With the new add_symbol_unique the symbol table will stay unique. On top of that when adding a new symbol func_8019055C can be replaced by MakeExplosion but not the other way around. This will ensure only meaningful names will be resolved.
Fixes a few issues found by @bismurphy where certain symbols that were not supposed to be added, were added.
The major fix is when the second pass found a meaningful symbol name like
MakeExplosion, the third pass could add a new symbol with the same offset but with the default splat namefunc_8019055C. With the newadd_symbol_uniquethe symbol table will stay unique. On top of that when adding a new symbolfunc_8019055Ccan be replaced byMakeExplosionbut not the other way around. This will ensure only meaningful names will be resolved.