[8182] Store and use Map* pointer in WorldObject instead map ids for speedup Author: Ambal

Also some code logic cleanups.
    Changes let make more cleanups in base map access and other places,
    but this chnages not inlcuded in patch.

*This patch may cause crash.

--HG--
branch : trunk

src/game/GameObject.cpp

@@ -137,9 +137,9 @@ void GameObject::RemoveFromWorld()
 
 bool GameObject::Create(uint32 guidlow, uint32 name_id, Map *map, uint32 phaseMask, float x, float y, float z, float ang, float rotation0, float rotation1, float rotation2, float rotation3, uint32 animprogress, GOState go_state, uint32 ArtKit)
 {
+    ASSERT(map);
     Relocate(x,y,z,ang);
-    SetMapId(map->GetId());
-    SetInstanceId(map->GetInstanceId());
+    SetMap(map);
     SetPhaseMask(phaseMask,false);
 
     if(!IsPositionValid())