fixes ticket #813
Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Reviewed-by: Jean First <jeanfirst@gmail.com>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit ef611095f0d0c1256cbb6654f94cae61a60f2736)