Fix db98cedb: Swap the tile parameter validation around as only the first TileIndex is automatically validated.

src/rail_cmd.cpp

@@ -880,7 +880,7 @@ static CommandCost CmdRailTrackHelper(DoCommandFlag flags, TileIndex tile, TileI
 	CommandCost total_cost(EXPENSES_CONSTRUCTION);
 
 	if ((!remove && !ValParamRailtype(railtype)) || !ValParamTrackOrientation(track)) return CMD_ERROR;
-	if (end_tile >= MapSize()) return CMD_ERROR;
+	if (end_tile >= MapSize() || tile >= MapSize()) return CMD_ERROR;
 
 	Trackdir trackdir = TrackToTrackdir(track);
 

src/road_cmd.cpp

@@ -976,7 +976,7 @@ static bool CanConnectToRoad(TileIndex tile, RoadType rt, DiagDirection dir)
  */
 CommandCost CmdBuildLongRoad(DoCommandFlag flags, TileIndex end_tile, TileIndex start_tile, RoadType rt, Axis axis, DisallowedRoadDirections drd, bool start_half, bool end_half, bool is_ai)
 {
-	if (end_tile >= MapSize()) return CMD_ERROR;
+	if (start_tile >= MapSize()) return CMD_ERROR;
 
 	if (!ValParamRoadType(rt) || !IsValidAxis(axis) || !IsValidDisallowedRoadDirections(drd)) return CMD_ERROR;
 
@@ -1074,7 +1074,7 @@ std::tuple<CommandCost, Money> CmdRemoveLongRoad(DoCommandFlag flags, TileIndex
 {
 	CommandCost cost(EXPENSES_CONSTRUCTION);
 
-	if (end_tile >= MapSize()) return { CMD_ERROR, 0 };
+	if (start_tile >= MapSize()) return { CMD_ERROR, 0 };
 	if (!ValParamRoadType(rt) || !IsValidAxis(axis)) return { CMD_ERROR, 0 };
 
 	/* Only drag in X or Y direction dictated by the direction variable */