When starting in the Abyss, randomize the colors properly.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6260 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on June 30, 2008
K3V5QHTA72BU6GMKP6VH6EVB7F2O6JGC7KMOBJS25VOLD4IETE4AC
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