[media] cpia2: fix typo in variable initialisation

Currently 'fh' initialises to whatever happens to be on stack. This
looks like a typo and this patch fixes that.
Signed-off-by: Mariusz Kozlowski <mk@lab.zgora.pl>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cpia2/cpia2_v4l.c

@@ -1313,7 +1313,7 @@ static int cpia2_g_priority(struct file *file, void *_fh, enum v4l2_priority *p)
 static int cpia2_s_priority(struct file *file, void *_fh, enum v4l2_priority prio)
 {
 	struct camera_data *cam = video_drvdata(file);
-	struct cpia2_fh *fh = fh;
+	struct cpia2_fh *fh = _fh;
 
 	if (cam->streaming && prio != fh->prio &&
 			fh->prio == V4L2_PRIORITY_RECORD)