git: Avoid calling chn_wrfeed with an empty soft buffer

[Francois Tigeot]

commit 5c04357c6f51b2e9e0e5788e502e227337ee4055
Author: Francis GUDIN <fgudin at nerim.net>
Date:   Fri May 3 14:28:27 2013 +0200

    Avoid calling chn_wrfeed with an empty soft buffer

Summary of changes:
 sys/dev/sound/pcm/channel.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/5c04357c6f51b2e9e0e5788e502e227337ee4055


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