(svn r22329) -Change: When the current orders are interrupted for non-ordered service, disable modifications to automatic orders until the next real order is completed. (train part already slipped by in r22328)

src/roadveh_cmd.cpp

@@ -1580,6 +1580,7 @@ static void CheckIfRoadVehNeedsService(RoadVehicle *v)
 		return;
 	}
 
+	SetBit(v->gv_flags, GVF_SUPPRESS_AUTOMATIC_ORDERS);
 	v->current_order.MakeGoToDepot(depot, ODTFB_SERVICE);
 	v->dest_tile = rfdd.tile;
 	SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);

src/vehicle.cpp

@@ -1986,6 +1986,11 @@ CommandCost Vehicle::SendToDepot(DoCommandFlag flags, DepotCommand command)
 			 * then skip to the next order; effectively cancelling this forced service */
 			if (this->current_order.GetDepotOrderType() & ODTFB_PART_OF_ORDERS) this->IncrementRealOrderIndex();
 
+			if (this->IsGroundVehicle()) {
+				uint16 &gv_flags = this->GetGroundVehicleFlags();
+				SetBit(gv_flags, GVF_SUPPRESS_AUTOMATIC_ORDERS);
+			}
+
 			this->current_order.MakeDummy();
 			SetWindowWidgetDirty(WC_VEHICLE_VIEW, this->index, VVW_WIDGET_START_STOP_VEH);
 		}
@@ -2001,6 +2006,11 @@ CommandCost Vehicle::SendToDepot(DoCommandFlag flags, DepotCommand command)
 	if (flags & DC_EXEC) {
 		if (this->current_order.IsType(OT_LOADING)) this->LeaveStation();
 
+		if (this->IsGroundVehicle()) {
+			uint16 &gv_flags = this->GetGroundVehicleFlags();
+			SetBit(gv_flags, GVF_SUPPRESS_AUTOMATIC_ORDERS);
+		}
+
 		this->dest_tile = location;
 		this->current_order.MakeGoToDepot(destination, ODTF_MANUAL);
 		if (!(command & DEPOT_SERVICE)) this->current_order.SetDepotActionType(ODATFB_HALT);