Fixing issue where some tile types (lava) weren't using any variations. (Now all tiles will automatically use variations from the tiledef file.)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7124 c06c8d41-db1a-0410-9941-cceddc491573

Created by  ennewalker  on October 4, 2008
MEVM2U3HOBYD6BF3GWKVARU54HLOC37IZKWG2YOJYY34N6OYLJ7AC
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