[PATCH] add soundcard device and fix device_file handling

[Danny Kukawka]

Hi,

this patch fixes these issues:
* change checks for empty device file path from 'device_file == NULL' 
  to 'device_file[0] == '\0'' since the device_file path is currently
  never NULL but '\0' if empty/unset.

* Add the sound card device to HAL (e.g. /sys/devices/pci*/*/card0) to
  represent the correct sysfs structure. All alsa and oss devices are 
  now childs of the releated sound card device.

Danny

 device.c |   39 +++++++++++++++++++++++++++++++--------
 1 file changed, 31 insertions(+), 8 deletions(-)
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