ALSA: ice1724: Fix uninitialized variable access

Spotted by coverity CIDs 751505 and 751506.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ice1712/wm8766.c

@@ -253,7 +253,8 @@ static int snd_wm8766_ctl_get(struct snd_kcontrol *kcontrol,
 	}
 	if (wm->ctl[n].flags & WM8766_FLAG_INVERT) {
 		val1 = wm->ctl[n].max - (val1 - wm->ctl[n].min);
-		val2 = wm->ctl[n].max - (val2 - wm->ctl[n].min);
+		if (wm->ctl[n].flags & WM8766_FLAG_STEREO)
+			val2 = wm->ctl[n].max - (val2 - wm->ctl[n].min);
 	}
 	ucontrol->value.integer.value[0] = val1;
 	if (wm->ctl[n].flags & WM8766_FLAG_STEREO)

sound/pci/ice1712/wm8776.c

@@ -526,7 +526,8 @@ static int snd_wm8776_ctl_get(struct snd_kcontrol *kcontrol,
 	}
 	if (wm->ctl[n].flags & WM8776_FLAG_INVERT) {
 		val1 = wm->ctl[n].max - (val1 - wm->ctl[n].min);
-		val2 = wm->ctl[n].max - (val2 - wm->ctl[n].min);
+		if (wm->ctl[n].flags & WM8776_FLAG_STEREO)
+			val2 = wm->ctl[n].max - (val2 - wm->ctl[n].min);
 	}
 	ucontrol->value.integer.value[0] = val1;
 	if (wm->ctl[n].flags & WM8776_FLAG_STEREO)