Oops, my last change broke _monster_swaps_places().

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8010 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on December 29, 2008
SO4ETBWQI536QDBQV5JMP4VKTLQIAUUYSNSVXMCNNCEAFJOT5M4QC
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