hda: fix nid variable warning

Fixed compiler warning with possible uninitialized variable 'nid'.

CC [M] /home/mranostay/git/alsa-driver/pci/hda/patch_sigmatel.o
/home/mranostay/git/alsa-driver/pci/hda/../../alsa-kernel/pci/hda/patch_sigmatel.c: In function ‘stac92xx_parse_auto_config’:
/home/mranostay/git/alsa-driver/pci/hda/../../alsa-kernel/pci/hda/patch_sigmatel.c:2815: warning: ‘nid’ may be used uninitialized in this function

---

index c461baa..f8bfb4c 100644
@@ -2812,7 +2812,7 @@ static int stac92xx_auto_create_multi_out_ctls(struct hda_codec *codec,
 	static const char *chname[4] = {
 		"Front", "Surround", NULL /*CLFE*/, "Side"
 	};
-	hda_nid_t nid;
+	hda_nid_t nid = 0;
 	int i, err;
 
 	struct sigmatel_spec *spec = codec->spec;

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At Mon, 13 Oct 2008 13:22:45 -0400,

Applied. Thanks.

Takashi