jhb 15fe5fedcb - Move all of the hwvol functions into a mixer_hwvol_* namespace, and make
all of the hwvol members of struct snd_mixer live in a hwvol_* namespace.
- When changing the mixer device via the hwvol_mixer sysctl, reset the
  muted state so that a mute operation on a new device won't try to
  unmute the new device with the old device's saved volume.
- When the volume is muted, if a down or up volume request is received,
  first restore the saved volume level and then adjust it.

Reviewed by:	cg
2001-01-11 23:26:16 +00:00
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