Fix compilation issue pointed out by vonbrand [2435089].

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7854 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on December 17, 2008
SDMEJHPO3GBMDVZK7DDZV5RP347O3V3UIHQYBXEOUUSKNAIR7STAC
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