Fix another comment typo.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3141 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on December 29, 2007
XABTX74AMBUM4A6E2YIMH6RPB267JEWLQITSYDK76IY77VMB5LZQC
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