[media] uvc: Add return code check at vb2_queue_init()

This function returns an integer and it's mandatory
to check the return code.

Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 3764040..af216ec 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -600,7 +600,7 @@
 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
 
 /* Video buffers queue management. */
-extern void uvc_queue_init(struct uvc_video_queue *queue,
+extern int uvc_queue_init(struct uvc_video_queue *queue,
 		enum v4l2_buf_type type, int drop_corrupted);
 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
 		struct v4l2_requestbuffers *rb);