[media] i2c: ov2659: signedness bug inov2659_set_fmt()

This needs to be signed or there is a risk of hitting a forever loop.

Fixes: c4c0283ab3cd ('[media] media: i2c: add support for omnivision's ov2659 sensor')

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/i2c/ov2659.c

@@ -1102,7 +1102,7 @@ static int ov2659_set_fmt(struct v4l2_subdev *sd,
 			  struct v4l2_subdev_format *fmt)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	unsigned int index = ARRAY_SIZE(ov2659_formats);
+	int index = ARRAY_SIZE(ov2659_formats);
 	struct v4l2_mbus_framefmt *mf = &fmt->format;
 	const struct ov2659_framesize *size = NULL;
 	struct ov2659 *ov2659 = to_ov2659(sd);