Revert last change, as the new logic's not quite right (oops).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@4082 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on April 6, 2008
KXYNUF4XKYHT5RWWZ43GLHBEOUJXWPQBDG76Y2KOL4E3TZQNNVAQC
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