Add random uselessness messages for when the player is silenced. These

are taken from spell miscasts, as many of the random uselessness messages are already.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5307 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on May 27, 2008
CA3UUPVVUCMU7V7AUUIG6LOPEQEQKNYRPCSKF7FECSCA6VCZYAAAC
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