Revert one of the previous changes: unlike fleeing monsters, monsters

leaving the level will no longer prefer their emergency spell, so that you can follow them to an exit if necessary.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5937 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on June 18, 2008
JL3PAZRG2HXMPDO6P7E4LTXYXQFVQTNWAOYENEQDKL65AHEP7BQQC
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