V4L/DVB (13941): rj54n1cb0c: remove compiler warning

Remove the following compiler warning: 'dummy' is used uninitialized in this function.
Although the result in the dummy variable is not used the program flow in
soc_camera_limit_side() depends on the value in dummy. The program flow is better
to be deterministic.
Signed-off-by: NMárton Németh <nm127@freemail.hu>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/rj54n1cb0c.c

@@ -563,7 +563,7 @@ static int rj54n1_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 	struct i2c_client *client = sd->priv;
 	struct rj54n1 *rj54n1 = to_rj54n1(client);
 	struct v4l2_rect *rect = &a->c;
-	unsigned int dummy, output_w, output_h,
+	unsigned int dummy = 0, output_w, output_h,
 		input_w = rect->width, input_h = rect->height;
 	int ret;