(svn r8875) -Fix

Remove unnecessary EnsureNoVehicle() checks because they are
- pointless per se (f.e. there are no vehicles on house tiles)
- done again (f.e. using CMD_LANDSCAPE_CLEAR just a few lines later)

src/rail_cmd.cpp

@@ -553,7 +553,6 @@ int32 CmdBuildTrainDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 
 	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
 
-	if (!EnsureNoVehicle(tile)) return CMD_ERROR;
 	/* check railtype and valid direction for depot (0 through 3), 4 in total */
 	if (!ValParamRailtype(p1) || p2 > 3) return CMD_ERROR;
 

src/road_cmd.cpp

@@ -518,8 +518,6 @@ int32 CmdBuildRoadDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 
 	if (p1 > 3) return CMD_ERROR; // check direction
 
-	if (!EnsureNoVehicle(tile)) return CMD_ERROR;
-
 	tileh = GetTileSlope(tile, NULL);
 	if (tileh != SLOPE_FLAT && (
 				!_patches.build_on_slopes ||

src/station_cmd.cpp

@@ -1747,15 +1747,11 @@ int32 CmdBuildDock(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 
 	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile)) return CMD_ERROR;
 
-	if (!EnsureNoVehicle(tile)) return CMD_ERROR;
-
 	cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
 	if (CmdFailed(cost)) return CMD_ERROR;
 
 	TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
 
-	if (!EnsureNoVehicle(tile_cur)) return CMD_ERROR;
-
 	if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
 		return_cmd_error(STR_304B_SITE_UNSUITABLE);
 	}

src/town_cmd.cpp

@@ -350,8 +350,6 @@ static int32 ClearTile_Town(TileIndex tile, byte flags)
 	int32 cost;
 	Town *t;
 
-	// safety checks
-	if (!EnsureNoVehicle(tile)) return CMD_ERROR;
 	if (flags&DC_AUTO && !(flags&DC_AI_BUILDING)) return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);
 
 	house = GetHouseType(tile);
@@ -1303,8 +1301,6 @@ static bool BuildTownHouse(Town *t, TileIndex tile)
 {
 	int32 r;
 
-	// make sure it's possible
-	if (!EnsureNoVehicle(tile)) return false;
 	if (IsSteepSlope(GetTileSlope(tile, NULL))) return false;
 	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return false;
 

src/tree_cmd.cpp

@@ -237,8 +237,6 @@ int32 CmdPlantTree(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 		for (y = sy; y <= ey; y++) {
 			TileIndex tile = TileXY(x, y);
 
-			if (!EnsureNoVehicle(tile)) continue;
-
 			switch (GetTileType(tile)) {
 				case MP_TREES:
 					// no more space for trees?