[7440] Use server-side only zone info. Optimize related calles in case zone and subzone use. Author: VladimirMangos

This in some cases make some zones not explorable if it not have server side data in current maps
    but not allow cheating with zone set from client.

--HG--
branch : trunk

src/game/Object.h

@@ -433,6 +433,7 @@ class TRINITY_DLL_SPEC WorldObject : public Object
 
         uint32 GetZoneId() const;
         uint32 GetAreaId() const;
+        void GetZoneAndAreaId(uint32& zoneid, uint32& areaid) const;
 
         InstanceData* GetInstanceData();