V4L/DVB: omap24xxcam: potential buffer overflow

The previous loop goes until last == VIDEO_MAX_FRAME, so this could
potentially go one past the end of the loop.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/omap24xxcam.c

@@ -1405,7 +1405,7 @@ static int omap24xxcam_mmap_buffers(struct file *file,
 	}
 
 	size = 0;
-	for (i = first; i <= last; i++) {
+	for (i = first; i <= last && i < VIDEO_MAX_FRAME; i++) {
 		struct videobuf_dmabuf *dma = videobuf_to_dma(vbq->bufs[i]);
 
 		for (j = 0; j < dma->sglen; j++) {