Fix variance when parent does not have an intesection type

Author: Girgias

Zend/zend_inheritance.c

@@ -546,7 +546,7 @@ static inheritance_status zend_perform_covariant_type_check(
 
 	/* For intersection types loop over the parent types first as a child
 	 * can add them */
-	if (ZEND_TYPE_HAS_INTERSECTION(proto_type)) {
+	if (ZEND_TYPE_HAS_INTERSECTION(proto_type) || ZEND_TYPE_HAS_INTERSECTION(fe_type)) {
 		/* First try to check whether we can succeed without resolving anything */
 		ZEND_TYPE_FOREACH(proto_type, single_type) {
 			inheritance_status status;