Fix [1948787]: Let Xom mutate engorged vampires.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@4471 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on April 22, 2008
2RW7ANB4PPWJC2MP2XCBAWBDGMHJUNNWKMXR74JONERE4X522CNQC
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