Put in more() when casting spells while silenced, following 1699991

(which I agree with.) Can be reverted if anyone feels strongly about it.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1298 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on April 13, 2007
R5DXVK5AC7Z3IEBBNJGDR5IOSDFJ5MNWMUXSAD2JWTLFVFYN3KCQC
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