[1960394] Fixed crash when examining items from %. (Menu objects own their MenuEntry objects, so you can't destroy a Menu and then pass around MenuEntry pointers.)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@4960 c06c8d41-db1a-0410-9941-cceddc491573

Created by  ennewalker  on May 9, 2008
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