Release old pictures after a resolution change in vp5/6 decoder

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit dba20b84784a7931b7eac50ced1d43e86801bde9)
(cherry picked from commit c9c6e5f4e8680b7b7801dd6943590ae9cd6bfd89)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
1 file changed