* Rename some more functions for consistency.

* Added missing call to FormulaScript::OnZeroDifferenceCalculation.
* Pass GridMap pointer into MapScript::OnLoadGridMap/OnUnloadGridMap.
* Fire map hooks for all map types, not only instances.

--HG--
branch : trunk

src/server/game/Server/Protocol/Handlers/MiscHandler.cpp

@@ -884,7 +884,7 @@ void WorldSession::HandleAreaTriggerOpcode(WorldPacket & recv_data)
         }
     }
 
-    if (sScriptMgr.OnTrigger(GetPlayer(), atEntry))
+    if (sScriptMgr.OnAreaTrigger(GetPlayer(), atEntry))
         return;
 
     uint32 quest_id = objmgr.GetQuestForAreaTrigger(Trigger_ID);