Fix detection of chaotic monsters when the chaotic attack isn't first in

the list (as with ghouls), and make sure Zin's sustenance is always a prayed-for effect.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9452 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on March 13, 2009
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