Fix [2187753]: friendlies with spells targeting you if you don't give

them another target. This is a hack, not a good solution, and it assumes that friendlies do not want to target you with spells (I believe this is currently true, but if we implement an enslavable monster that can heal others, it won't be.)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8893 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on February 4, 2009
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