Core/Commands: Fixed .gobject add command

(cherry picked from commit b4d044aa13)

src/server/scripts/Commands/cs_gobject.cpp

@@ -166,6 +166,8 @@ public:
 
         // fill the gameobject data and save to the db
         object->SaveToDB(map->GetId(), (1 << map->GetSpawnMode()), player->GetPhaseMaskForSpawn());
+        guidLow = object->GetSpawnId();
+
         // delete the old object and do a clean load from DB with a fresh new GameObject instance.
         // this is required to avoid weird behavior and memory leaks
         delete object;