media: usb: don't initialize vars if not needed

Some local variables will be set to an appropriate value before usage.
Thus omit explicit initialisations at the beginning of these functions.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/usb/tm6000/tm6000-cards.c

@@ -1174,7 +1174,7 @@ static int tm6000_usb_probe(struct usb_interface *interface,
 {
 	struct usb_device *usbdev;
 	struct tm6000_core *dev;
-	int i, rc = 0;
+	int i, rc;
 	int nr = 0;
 	char *speed;