Make animate_a_corpse() and animate_dead() use the new stack_iterator

class.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5881 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on June 16, 2008
W63CCAP4YTMHQT35LMWGB7XPBXMFF7BLYCI3YRPCCQWFRTXVLTJAC
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