[PATCH] USB: Fix warning in drivers/usb/media/ov511.c

Gcc 4.0.2 had the warning:

drivers/usb/media/ov511.c: In function 'show_exposure':
drivers/usb/media/ov511.c:5642: warning: 'exp' may be used uninitialized
in this function

Here is the patch to fix that warning.
Signed-off-by: NMatthew Martin <lihnucks@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/media/ov511.c

@@ -5639,7 +5639,7 @@ static CLASS_DEVICE_ATTR(hue, S_IRUGO, show_hue, NULL);
 static ssize_t show_exposure(struct class_device *cd, char *buf)
 {
 	struct usb_ov511 *ov = cd_to_ov(cd);
-	unsigned char exp;
+	unsigned char exp = 0;
 
 	if (!ov->dev)
 		return -ENODEV;