diff -r 7c8ec33959b1 -r 4b5241e5dd10 src/tree_cmd.cpp
--- a/src/tree_cmd.cpp	Tue Feb 27 23:54:28 2007 +0000
+++ b/src/tree_cmd.cpp	Wed Feb 28 00:33:40 2007 +0000
@@ -228,8 +228,8 @@
 	ey = TileY(tile);
 	sx = TileX(p2);
 	sy = TileY(p2);
-	if (ex < sx) intswap(ex, sx);
-	if (ey < sy) intswap(ey, sy);
+	if (ex < sx) Swap(ex, sx);
+	if (ey < sy) Swap(ey, sy);
 
 	cost = 0; // total cost
 
@@ -237,8 +237,6 @@
 		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?