Fix initialized mem

Author: Girgias

ext/pdo/pdo_stmt.c

@@ -2088,6 +2088,12 @@ zend_object *pdo_dbstmt_new(zend_class_entry *ce)
 	pdo_stmt_t *stmt;
 
 	stmt = zend_object_alloc(sizeof(pdo_stmt_t), ce);
+	/* Initialize fetch memory */
+	ZVAL_UNDEF(&stmt->fetch.into);
+	stmt->fetch.cls.ctor_args = NULL;
+	stmt->fetch.cls.ce = NULL;
+	memcpy(&stmt->fetch.func.fcc, &empty_fcall_info_cache, sizeof(empty_fcall_info_cache));
+
 	zend_object_std_init(&stmt->std, ce);
 	object_properties_init(&stmt->std, ce);