isdn: hfc_usb: Fix set-but-unused variables.

The variable 'buf' is set but unused in
ctrl_complete().  Just kill it off.

Similarly for 'err' in hfc_usb_init().
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/isdn/hisax/hfc_usb.c

@@ -258,11 +258,9 @@ static void
 ctrl_complete(struct urb *urb)
 {
 	hfcusb_data *hfc = (hfcusb_data *) urb->context;
-	ctrl_buft *buf;
 
 	urb->dev = hfc->dev;
 	if (hfc->ctrl_cnt) {
-		buf = &hfc->ctrl_buff[hfc->ctrl_out_idx];
 		hfc->ctrl_cnt--;	/* decrement actual count */
 		if (++hfc->ctrl_out_idx >= HFC_CTRL_BUFSIZE)
 			hfc->ctrl_out_idx = 0;	/* pointer wrap */
@@ -1097,7 +1095,7 @@ static int
 hfc_usb_init(hfcusb_data * hfc)
 {
 	usb_fifo *fifo;
-	int i, err;
+	int i;
 	u_char b;
 	struct hisax_b_if *p_b_if[2];
 
@@ -1112,7 +1110,7 @@ hfc_usb_init(hfcusb_data * hfc)
 	}
 
 	/* first set the needed config, interface and alternate */
-	err = usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
+	usb_set_interface(hfc->dev, hfc->if_used, hfc->alt_used);
 
 	/* do Chip reset */
 	write_usb(hfc, HFCUSB_CIRM, 8);