by swapping places with a monster. Fixes [2535944].
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8748 c06c8d41-db1a-0410-9941-cceddc491573
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if (!move_player_to_grid(targ, true, false, swap, swap))
if (!move_player_to_grid(targ, true, false, false, swap))