(zend_fetch_resource) added warinig if resource is of wrong type

Zend/zend_list.c

@@ -196,6 +196,10 @@ ZEND_API void *zend_fetch_resource(zval **passed_id, int default_id, char *resou
 		}
 	}
 	va_end(resource_types);
+
+	if (resource_type_name)
+		zend_error(E_WARNING, "Supplied resource is not a valid %s resource", resource_type_name);
+
 	return NULL;
 }