LICENSE: add libutvideo in the GPL libraries list.
mpegvideo: Make the table reallocation more robust.

This fixes out of array writes after resolution changes
No FFmpeg releases are known to be affected by this

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
yop: Do not keep a copy of parts of the returned packet

Fixes double free
Regression since the new buffer references, thus no FFmpeg
releases should be affected

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>