[2392486] Fixing infinite loop in map generation. (Stupid comma operator.)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7755 c06c8d41-db1a-0410-9941-cceddc491573

Created by  ennewalker  on December 5, 2008
QXICUYXUKLJ7FWTWNQDLDZKEMV2EEOD6ADQT5TMWMOOWEUHNR2BQC
Change contents