[ALSA] ali5451 - Fix invalid type of codec->irq field

The irq field of struct snd_ali shouldn't be unsigned since it's
uninitialized value is -1.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/pci/ali5451/ali5451.c

@@ -239,7 +239,7 @@ struct snd_ali_image {
 
 
 struct snd_ali {
-	unsigned long	irq;
+	int		irq;
 	unsigned long	port;
 	unsigned char	revision;
 
@@ -2343,7 +2343,7 @@ static int __devinit snd_ali_probe(struct pci_dev *pci,
 	strcpy(card->driver, "ALI5451");
 	strcpy(card->shortname, "ALI 5451");
 	
-	sprintf(card->longname, "%s at 0x%lx, irq %li",
+	sprintf(card->longname, "%s at 0x%lx, irq %i",
 		card->shortname, codec->port, codec->irq);
 
 	snd_ali_printk("register card.\n");