Core/AI: use NullGameObjectAI for gameobjects with ScriptName

- use GameObjectAI with Transports too

--HG--
branch : trunk

src/server/game/AI/CreatureAISelector.cpp

@@ -137,7 +137,7 @@ namespace FactorySelector
 
         //future goAI types go here
 
-        std::string ainame = (ai_factory == NULL) ? "NullGameObjectAI" : ai_factory->key();
+        std::string ainame = (ai_factory == NULL || go->GetScriptId()) ? "NullGameObjectAI" : ai_factory->key();
 
         sLog.outStaticDebug("GameObject %u used AI is %s.", go->GetGUIDLow(), ainame.c_str());