Fix broken portal vault exits.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7471 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on November 18, 2008
562A65YJIRNJCMJNP3GNLKC5KSPFGZHDWPU4LYCDTBUBXN6FYVMAC
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