Give may_stab_brand to unable-to-act (paralysed, petrified) monsters, since

they're not a guaranteed stab. Only sleeping monsters are. Fixes [2595731].

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9075 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on February 14, 2009
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