Fix Triple Draw not updating num_marked on a deck. Fixes [2516231].

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8895 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on February 4, 2009
3Z46NUKRWJ4YMLS3C5GXSN3WKBZPCU6CBBG2DOJAXOWY2WIIRFDQC
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