(svn r21933) -Codechange: Split cur_order_index into cur_auto_order_index and cur_real_order_index to keep track of the current real order in an unambiguous way.

-Fix [FS#4440]: Automatic orders behave now stable wrt. service orders and are not added or removed depending on the need of servicing.
-Fix: Various other issues with automatic orders, e.g. vehicles getting stuck with "no orders" when there are automatic orders at the end of the order list.

src/ship_cmd.cpp

@@ -234,7 +234,7 @@ TileIndex Ship::GetOrderStationLocation(StationID station)
 	if (st->dock_tile != INVALID_TILE) {
 		return TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
 	} else {
-		this->IncrementOrderIndex();
+		this->IncrementRealOrderIndex();
 		return 0;
 	}
 }
@@ -480,7 +480,7 @@ static void ShipController(Ship *v)
 						/* We got within 3 tiles of our target buoy, so let's skip to our
 						 * next order */
 						UpdateVehicleTimetable(v, true);
-						v->IncrementOrderIndex();
+						v->IncrementRealOrderIndex();
 						v->current_order.MakeDummy();
 					} else {
 						/* Non-buoy orders really need to reach the tile */
@@ -500,7 +500,7 @@ static void ShipController(Ship *v)
 									v->BeginLoading();
 								} else { // leave stations without docks right aways
 									v->current_order.MakeLeaveStation();
-									v->IncrementOrderIndex();
+									v->IncrementRealOrderIndex();
 								}
 							}
 						}