After more thought, don't show Zin's mutation protection message if

failMsg is false, as TSO's isn't shown all the time either.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@4797 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on May 1, 2008
GKXQTRTUZZBOE4B7PNZG57FKZSLT6JXDKLRJW5B7R5CQV5NL76EQC
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