Provide non-magic-map glyph for detected items since the square may already be marked mapped/seen.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2984 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on December 2, 2007
MN4TJZVTK27PM5ETQBJBUMF64CXJRN75IVCS2MWGTIVCFPRR7LOAC
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