avformat/utils: fix typo

Found-by: reimar
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/mpegtsenc: use av_malloc_array()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/xmv: use av_malloc_array()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avutil/frame: use av_malloc(z)_array()

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