[7487] Avoid attempt use InstanceSave data for non-dungeons. Author: VladimirMangos

Also check map existance and correctness at instance data loading.
    Removed unused and totally bugged InstanceMap::GetResetTime.

--HG--
branch : trunk

src/game/Map.h

@@ -544,7 +544,6 @@ class TRINITY_DLL_SPEC InstanceMap : public Map
         uint32 GetScriptId() { return i_script_id; }
         InstanceData* GetInstanceData() { return i_data; }
         void PermBindAllPlayers(Player *player);
-        time_t GetResetTime();
         void UnloadAll();
         bool CanEnter(Player* player);
         void SendResetWarnings(uint32 timeLeft) const;