V4L/DVB (3420): Nskips maybe used uninitialized in bttv_risc_overlay

The Coverity checker (previously Stanford checker) noticed that
the value of nskips could be read even if it was never written.

Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/media/video/bttv-risc.c b/drivers/media/video/bttv-risc.c
index a60c211c9e31..5c746110df62 100644
--- a/drivers/media/video/bttv-risc.c
+++ b/drivers/media/video/bttv-risc.c
@@ -276,6 +276,8 @@ bttv_risc_overlay(struct bttv *btv, struct btcx_riscmem *risc,
                 if (line > maxy)
                         btcx_calc_skips(line, ov->w.width, &maxy,
                                         skips, &nskips, ov->clips, ov->nclips);
+                else
+                        nskips = 0;
 
                 /* write out risc code */
                 for (start = 0, skip = 0; start < ov->w.width; start = end) {