Codechange: replace INVALID_X with XID::Invalid() for PoolIDs

src/order_gui.cpp

@@ -666,7 +666,7 @@ private:
 		Order order;
 		order.next = nullptr;
 		order.index = OrderID::Begin();
-		order.MakeGoToDepot(INVALID_DEPOT, ODTFB_PART_OF_ORDERS,
+		order.MakeGoToDepot(DepotID::Invalid(), ODTFB_PART_OF_ORDERS,
 				_settings_client.gui.new_nonstop && this->vehicle->IsGroundVehicle() ? ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS : ONSF_STOP_EVERYWHERE);
 		order.SetDepotActionType(ODATFB_NEAREST_DEPOT);