V4L/DVB: use correct size in put_v4l2_window32()

Although these sizes may be the same it is better to calculate the size of
the source, than the destiny.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1 file changed