ALSA: hda - Fix uninitialized variable

Fix the following compile warning.  kctl should be NULL-initialized.

  sound/pci/hda/patch_realtek.c: In function ‘alc_build_controls’:
  sound/pci/hda/patch_realtek.c:2550:23: warning: ‘kctl’ may be used uninitialized in this function

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

1 files changed, 1 insertions, 1 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index f1ce7d7f5aa3..2bf678917e87 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -2547,7 +2547,7 @@ static struct snd_kcontrol_new alc_beep_mixer[] = {
 static int alc_build_controls(struct hda_codec *codec)
 {
         struct alc_spec *spec = codec->spec;
-        struct snd_kcontrol *kctl;
+        struct snd_kcontrol *kctl = NULL;
         struct snd_kcontrol_new *knew;
         int i, j, err;
         unsigned int u;