Fix 6fe445e: Removing rail station parts without ctrl pressed was also removing tracks

The behaviour of holding ctrl key is swapped

src/rail_gui.cpp

@@ -696,14 +696,16 @@ struct BuildRailToolbarWindow : Window {
 					if (this->IsWidgetLowered(WID_RAT_BUILD_STATION)) {
 						/* Station */
 						if (_remove_button_clicked) {
-							Command<CMD_REMOVE_FROM_RAIL_STATION>::Post(STR_ERROR_CAN_T_REMOVE_PART_OF_STATION, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, _ctrl_pressed);
+							bool keep_rail = !_ctrl_pressed;
+							Command<CMD_REMOVE_FROM_RAIL_STATION>::Post(STR_ERROR_CAN_T_REMOVE_PART_OF_STATION, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, keep_rail);
 						} else {
 							HandleStationPlacement(start_tile, end_tile);
 						}
 					} else {
 						/* Waypoint */
 						if (_remove_button_clicked) {
-							Command<CMD_REMOVE_FROM_RAIL_WAYPOINT>::Post(STR_ERROR_CAN_T_REMOVE_TRAIN_WAYPOINT, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, _ctrl_pressed);
+							bool keep_rail = !_ctrl_pressed;
+							Command<CMD_REMOVE_FROM_RAIL_WAYPOINT>::Post(STR_ERROR_CAN_T_REMOVE_TRAIN_WAYPOINT, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, keep_rail);
 						} else {
 							TileArea ta(start_tile, end_tile);
 							Axis axis = select_method == VPM_X_LIMITED ? AXIS_X : AXIS_Y;