Prevent monsters from zapping wands at a player in sanctuary by putting

a sanctuary check in mons_should_fire().

Force monster to stop fleeing before it zaps a wand at the player.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6178 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on June 28, 2008
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