V4L/DVB (8256): uvc/uvc_v4l2.c: suppress uninitialized var warning

drivers/media/video/uvc/uvc_v4l2.c: In function `uvc_v4l2_mmap':
drivers/media/video/uvc/uvc_v4l2.c:1035: warning: 'buffer' might be used uninitialized in this function

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/uvc/uvc_v4l2.c

@@ -1032,7 +1032,7 @@ static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	struct video_device *vdev = video_devdata(file);
 	struct uvc_video_device *video = video_get_drvdata(vdev);
-	struct uvc_buffer *buffer;
+	struct uvc_buffer *uninitialized_var(buffer);
 	struct page *page;
 	unsigned long addr, start, size;
 	unsigned int i;