[2455489] Fixing "dark" levels after crashes, due to the tile flavor being set after the level was saved. (This wasn't a problem until it started being saved recently.)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7968 c06c8d41-db1a-0410-9941-cceddc491573

Created by  ennewalker  on December 24, 2008
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