Another tweak of the chokepoint AI: Hostile monsters of animal-like

intelligence now only make space for other monsters of the same type.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7447 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on November 15, 2008
ONH7AQ3AEA243UATI74P3TIWSS772XK3TA2JOZQZN6I5GO4Q5IZAC
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