avcodec/twinvq: Use FF_ALLOC_ARRAY_OR_GOTO()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/mpegvideo: Use FF_ALLOCZ_ARRAY_OR_GOTO()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/dnxhdenc: Use FF_ALLOCZ_ARRAY_OR_GOTO()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/h264: Use FF_ALLOCZ_ARRAY_OR_GOTO()

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