Greedy explore forces autopickup if there's an item on the starting square

instead of going into an tight loop.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@578 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on December 6, 2006
HIJA2PEGEFA2BL6CPI6S74CCEQUHZSFYIFQ7VR6NEYGLBPZJ6G2QC
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