evas: multiple call to evas_object_del are allowed even after the first one succeeded.

src/lib/evas/canvas/evas_object_main.c

@@ -1033,6 +1033,7 @@ evas_object_del(Evas_Object *obj)
         return;
      }
    pd = efl_data_scope_get(obj, MY_CLASS);
+   if (pd->delete_me || pd->efl_del_called) return;
    if (pd->ref)
      {
         pd->del_ref = EINA_TRUE;