Fix [2537470]: Add AT_HIT attacks to those monsters that don't have any,

but can use weapons: vampires, vampire mages, and ghouls.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8990 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on February 8, 2009
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