Consolidate the confused undead checks, and unbreak the killer index

sanioty checks for anonymous friendly monsters (oops).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9869 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on May 31, 2009
KDPJ5HMPM3G2ZE6SV3P24QRRQMZ5NCR5ERT5X3QQZAWN6JVIRUFAC
Change contents