[ALSA] Fix a compile warning

Modules: CS4231 driver

Fix a compile warning (unused variable).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/isa/cs423x/cs4231_lib.c b/sound/isa/cs423x/cs4231_lib.c
index 05d0d40..eab7eb5 100644
--- a/sound/isa/cs423x/cs4231_lib.c
+++ b/sound/isa/cs423x/cs4231_lib.c
@@ -1306,7 +1306,7 @@
 {
 	int reg;
 	unsigned long flags;
-	int timeout;
+	/* int timeout; */
 	
 	snd_cs4231_mce_up(chip);
 	spin_lock_irqsave(&chip->reg_lock, flags);