Fix the display of monsters in the tiles minimap. (My mistake, sorry.)

And remove the strange exception for shafts in the calling of handle_traps() as brought up in Bug 1916327 (now discussion about levitation + traps).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3863 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on March 24, 2008
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