avformat/smoothstreamingenc: Use av_mallocz_array()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
hevc: Fix 4K sample video

Reviewed-by: smarter
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
huffyuv: fate: add a BGR24 test

It was previously untested.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Do not suggest to use gas-preprocessor on aix where it doesn't work.