usbaudio: fix for out->dev->lock remains locked in error case

out->dev->lock remains locked in error case in out_write()
Added pthread_mutex_unlock() in the error case

Bug: 12824374
Change-Id: Ibbbd5ced1f9d469cfba3b33a94414d0b94affa8f
Signed-off-by: Glenn Kasten <gkasten@google.com>
1 file changed