Core/Instances: fixed another deprecation warning

src/server/game/Instances/InstanceSaveMgr.cpp

@@ -387,7 +387,7 @@ void InstanceSaveManager::LoadResetTimes()
             continue;
 
         // the reset_delay must be at least one day
-        uint32 period = uint32(((mapDiff->resetTime * sWorld->getRate(RATE_INSTANCE_RESET_TIME))/DAY) * float(DAY));
+        uint32 period = uint32(((mapDiff->resetTime * sWorld->getRate(RATE_INSTANCE_RESET_TIME)) / float(DAY)) * float(DAY));
         if (period < DAY)
             period = DAY;