Core/Transport: fix logic error

justStopped was always set true, but when transports spawn and remain stationary timer, _currentFrame->ArriveTime and _currentFrame->DepartureTime are set to 0, making justStopped always remain true and triggering incorrect calls.

src/server/game/Entities/Transport/Transport.cpp

@@ -149,8 +149,8 @@ void Transport::Update(uint32 diff)
 
             if (timer < _currentFrame->DepartureTime)
             {
+                justStopped = IsMoving();
                 SetMoving(false);
-                justStopped = true;
                 if (_pendingStop && GetGoState() != GO_STATE_READY)
                 {
                     SetGoState(GO_STATE_READY);