Fix bug #2502460: delays causing asserts (oops).

Xom gift monsters are placed immediately, so it's possible for them to get damaged by the ongoing actions of the player.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8435 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on January 12, 2009
CYGE2HFCVSLUJOK7AJ6MILAHS3374R7MQEAZTALS2A6GQZUYY6SAC
Change contents