ALSA: hda - Don't handle empty patch files
authorTakashi Iwai <tiwai@suse.de>
Thu, 10 Feb 2011 16:39:20 +0000 (17:39 +0100)
committerTakashi Iwai <tiwai@suse.de>
Thu, 10 Feb 2011 16:39:20 +0000 (17:39 +0100)
When an empty string is passed to patch option, the driver should
ignore it.  Otherwise it gets an error by trying to load it.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

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