Add into zval to GC buffer first

Author: Girgias

ext/pdo/pdo_stmt.c

@@ -2027,8 +2027,11 @@ static zend_function *dbstmt_method_get(zend_object **object_pp, zend_string *me
 static HashTable *dbstmt_get_gc(zend_object *object, zval **gc_data, int *gc_count)
 {
 	pdo_stmt_t *stmt = php_pdo_stmt_fetch_object(object);
-	*gc_data = &stmt->fetch.into;
-	*gc_count = 1;
+
+	zend_get_gc_buffer *gc_buffer = zend_get_gc_buffer_create();
+	zend_get_gc_buffer_add_zval(gc_buffer, &stmt->fetch.into);
+	zend_get_gc_buffer_add_zval(gc_buffer, &stmt->database_object_handle);
+	zend_get_gc_buffer_use(gc_buffer, gc_data, gc_count);
 
 	/**
 	 * If there are no dynamic properties and the default property is 1 (that is, there is only one property