Fix crash when GDScript scripts are reloaded during initial import

modules/gdscript/gdscript.cpp

@@ -187,9 +187,9 @@ GDScriptInstance *GDScript::_create_instance(const Variant **p_args, int p_argco
 		return instance;
 	}
 
-	initializer = _super_constructor(this);
-	if (initializer != nullptr) {
-		initializer->call(instance, p_args, p_argcount, r_error);
+	GDScriptFunction *applicable_initializer = _super_constructor(this);
+	if (applicable_initializer != nullptr) {
+		applicable_initializer->call(instance, p_args, p_argcount, r_error);
 		if (r_error.error != Callable::CallError::CALL_OK) {
 			String error_text = Variant::get_call_error_text(instance->owner, "_init", p_args, p_argcount, r_error);
 			instance->script = Ref<GDScript>();