[BUG] Basher doesn't stop at slope

[namida]

In L3D a basher will stop if there isn't a wall in front of him when he reaches the edge of a block. In Loap, he will currently bash even for a slope in this case - which L3D only allows when the basher is first assigned.

In particular, this prevents the (presumably) intended solution to Tricky 29 "Land Ahoy" from working (though the level can be solved via backroutes).

[namida]

Fixed in commit 55fdd46.