V4L: ivtv: fix VIDIOC_S_FBUF: new OSD values were never set

cherry picked from commit c3624f99

ivtv: fix VIDIOC_S_FBUF support: new OSD values were never actually set.

The values set with VIDIOC_S_FBUF were not actually used until the next
VIDIOC_S_FMT. Fixed.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/media/video/ivtv/ivtv-ioctl.c

@@ -1183,6 +1183,7 @@ int ivtv_v4l2_ioctls(struct ivtv *itv, struct file *filp, unsigned int cmd, void
 		itv->osd_global_alpha_state = (fb->flags & V4L2_FBUF_FLAG_GLOBAL_ALPHA) != 0;
 		itv->osd_local_alpha_state = (fb->flags & V4L2_FBUF_FLAG_LOCAL_ALPHA) != 0;
 		itv->osd_color_key_state = (fb->flags & V4L2_FBUF_FLAG_CHROMAKEY) != 0;
+		ivtv_set_osd_alpha(itv);
 		break;
 	}