Revert previous change, as random uselessness is a scroll effect, and

won't work when silenced.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5308 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on May 28, 2008
YBYCTMIHQ2LLSLZNC6CLZ26KJVQZBNAM23ZVZKYSFC2DKTAXHVZAC
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