V4L/DVB (8883): w9968cf: Fix order of usb_alloc_urb validation

Fixed order of usb_alloc_urb pointer validation.

Cc: Luca Risolia <[e-mail]>
Signed-off-by: Douglas Schilling Landgraf <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/video/w9968cf.c

···
 
 	for (i = 0; i < W9968CF_URBS; i++) {
 		urb = usb_alloc_urb(W9968CF_ISO_PACKETS, GFP_KERNEL);
-		cam->urb[i] = urb;
 		if (!urb) {
 			for (j = 0; j < i; j++)
 				usb_free_urb(cam->urb[j]);
···
 			return -ENOMEM;
 		}
 
+		cam->urb[i] = urb;
 		urb->dev = udev;
 		urb->context = (void*)cam;
 		urb->pipe = usb_rcvisocpipe(udev, 1);