[AD] KCM audio bug

["Trent Gamblin" <trent@xxxxxxxxxx>]

With a lot of help from Elias I think we've fixed a bug in KCM. The problem was that streams had
some hack mutex attached to them and the feeder thread was running while the mutex was changed out
from under it. Patch is attached. I just commented out the now unneeded initial mutexes and moved
the call to _al_kcm_stream_set_mutex up so it happens before the feeder thread gets going.


Trent :{)>

Attachment: kcm.diff
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