Fix missing return for checkViaDescriptors in FqNameEqualityChecker

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/symbols/IrClassifierEqualityChecker.kt

@@ -17,7 +17,9 @@ interface IrClassifierEqualityChecker {
 object FqNameEqualityChecker : IrClassifierEqualityChecker {
     override fun areEqual(left: IrClassifierSymbol, right: IrClassifierSymbol): Boolean {
         if (left === right) return true
-        if (!left.isBound || !right.isBound) checkViaDescriptors(left.descriptor, right.descriptor)
+        if (!left.isBound || !right.isBound) {
+            return checkViaDescriptors(left.descriptor, right.descriptor)
+        }
         return checkViaDeclarations(left.owner, right.owner)
     }
 
@@ -54,4 +56,4 @@ object FqNameEqualityChecker : IrClassifierEqualityChecker {
     }
 
     private fun checkViaDescriptors(c1: ClassifierDescriptor, c2: ClassifierDescriptor) = c1.typeConstructor == c2.typeConstructor
-}
+}