Fix bad logic where the address of coinflip() was used instead of the

return value of coinflip(), making the result always true.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@10080 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on June 30, 2009
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