*Fix a crash.

--HG--
branch : trunk

src/game/ObjectMgr.cpp

@@ -6019,7 +6019,6 @@ uint32 ObjectMgr::GenerateLowGuid(HighGuid guidhigh)
             }
             return m_hiPetGuid++;
         case HIGHGUID_VEHICLE:
-            ASSERT(0);
             if(m_hiVehicleGuid>=0x00FFFFFF)
             {
                 sLog.outError("Vehicle guid overflow!! Can't continue, shutting down server. ");