(svn r17071) -Fix: give a better error message when trying to make road one-way when it doesn't belong to you

src/road_cmd.cpp

@@ -489,9 +489,12 @@ CommandCost CmdBuildRoad(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
 					}
 					if ((existing & pieces) == pieces) {
 						/* We only want to set the (dis)allowed road directions */
-						if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM && IsRoadOwner(tile, ROADTYPE_ROAD, _current_company)) {
+						if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM) {
 							if (crossing) return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
 
+							Owner owner = GetRoadOwner(tile, ROADTYPE_ROAD);
+							if (owner != OWNER_NONE && !CheckOwnership(owner)) return CMD_ERROR;
+
 							if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
 
 							/* Ignore half built tiles */