Fix SOE on library source based lightclass lookup

Fixed KT-41325

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt

@@ -250,6 +250,7 @@ object SourceNavigationHelper {
             }
 
             override fun contains(file: VirtualFile): Boolean {
+                if (file == vFile) return false
                 val entries = idx.getOrderEntriesForFile(file)
                 return entries.any { orderEntries.contains(it) }
             }