Fix silent channel not working.
Fix silent channel not working.

snowblind/umurmur,doctaweeks/umurmur,doctaweeks/umurmur,troxor/umurmur,doctaweeks/umurmur,fmorgner/umurmur,troxor/umurmur,fmorgner/umurmur,snowblind/umurmur