[1707320] The game was not reducing damage for quarterstaff + shield, fixed.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1382 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on April 27, 2007
RE27NAJV7KB4TSH5NCHAHDTUU73NXMSVQBKNJX3XZP7TVGDR3JLQC
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