Core/Scripts: Fix a logic fail that overriden the script of an entity…

… that changed entry

src/server/game/Entities/GameObject/GameObject.cpp

@@ -1948,7 +1948,8 @@ void GameObject::EventInform(uint32 eventId, WorldObject* invoker /*= nullptr*/)
 uint32 GameObject::GetScriptId() const
 {
     if (GameObjectData const* gameObjectData = GetGOData())
-        return gameObjectData->ScriptId;
+        if (uint32 scriptId = gameObjectData->ScriptId)
+            return scriptId;
 
     return GetGOInfo()->ScriptId;
 }