Simplify handling of monsters without skeletons. Note that monsters

that have skeletons, but cannot be zombified, will now leave skeletons after their corpses rot.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7432 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on November 9, 2008
FNBMJB2OUNPA27P6YDWCCQX5IJECAEM3F7THO73CIGXYUWXVBLIAC
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