ALSA: mixart: don't print an unintialized variable on error

My static checker complains that "resp" could be unitialized on error
when we print its value.

Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: Takashi Sakamoto <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>

Author: Dan Carpenter

sound/pci/mixart/mixart_mixer.c

@@ -965,7 +965,7 @@ static int mixart_update_monitoring(struct snd_mixart* chip, int channel)
 	int err;
 	struct mixart_msg request;
 	struct mixart_set_out_audio_level audio_level;
-	u32 resp;
+	u32 resp = 0;
 
 	if(chip->pipe_out_ana.status == PIPE_UNDEFINED)
 		return -EINVAL; /* no pipe defined */