[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/DynamicObject.cpp

@@ -72,9 +72,8 @@ void DynamicObject::RemoveFromWorld()
 
 bool DynamicObject::Create( uint32 guidlow, Unit *caster, uint32 spellId, uint32 effIndex, float x, float y, float z, int32 duration, float radius )
 {
-    SetInstanceId(caster->GetInstanceId());
-
-    WorldObject::_Create(guidlow, HIGHGUID_DYNAMICOBJECT, caster->GetMapId(), caster->GetPhaseMask());
+    WorldObject::_Create(guidlow, HIGHGUID_DYNAMICOBJECT, caster->GetPhaseMask());
+    SetMap(caster->GetMap());
     Relocate(x, y, z, 0);
 
     if(!IsPositionValid())