Delete mp=uspp
lavc/avpacket: check for malloc failure

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/utils: check for malloc failure

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
lavu/dict: check for malloc failures

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