(svn r1790) Make CmdPlantTree() and related functions more safe and (hopefully) more readable:
- check if end tile is on the map
- uint -> TileIndex
- if cascades -> switch
?package(openttd):needs="X11" section="Games/Simulation" title="Openttd"\
command="/usr/games/openttd" icon="/usr/share/games/openttd/openttd.64.xpm"