ALSA: hda - Fix NULL-derefence with a single mic in STAC auto-mic detection
When only one mic is available and it's an analog mic, the current IDT/STAC parser may give an Oops. Reference: bko#25692 https://bugzilla.kernel.org/show_bug.cgi?id=25692Signed-off-by: Takashi Iwai <tiwai@suse.de> Cc: <stable@kernel.org>
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