[ALSA] ali5451 warning fix

sound/pci/ali5451/ali5451.c: In function 'snd_ali_prepare':
sound/pci/ali5451/ali5451.c:716: warning: 'R2' may be used uninitialized in this function

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/pci/ali5451/ali5451.c

@@ -731,8 +731,7 @@ static void snd_ali_detect_spdif_rate(struct snd_ali *codec)
 		return;
 	}
 
-	count = 0;
-	while (count++ <= 50000) {
+	for (count = 0; count <= 50000; count++) {
 		snd_ali_delay(codec, 6);
 		bval = inb(ALI_REG(codec,ALI_SPDIF_CTRL + 1));
 		R2 = bval & 0x1F;