ALSA: mixart: Remove unused variable

'err' is not used in the function. Remove it.
Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/mixart/mixart_core.c

@@ -151,13 +151,11 @@ static int send_msg( struct mixart_mgr *mgr,
 {
 	u32 headptr, tailptr;
 	u32 msg_frame_address;
-	int err, i;
+	int i;
 
 	if (snd_BUG_ON(msg->size % 4))
 		return -EINVAL;
 
-	err = 0;
-
 	/* get message frame address */
 	tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
 	headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD));