ffmpeg 3.2.3

[Pierre Labastie]

New point version:

version 3.2.3:
- avcodec/movtextdec: Fix decode_styl() cleanup
- lavf/matroskadec: fix is_keyframe for early Blocks
- configure: bump year
- avcodec/pngdec: Check trns more completely
- avcodec/interplayvideo: Move parameter change check up
- avcodec/dca_lbr: Fix off by 1 error in freq check
- avcodec/mjpegdec: Check for for the bitstream end in
mjpeg_decode_scan_progres sive_ac()
- pgssubdec: reset rle_data_len/rle_remaining_len on allocation error
- swscale: save ebx register when it is not available
- avformat/flacdec: Check avio_read result when reading flac block header.
- avcodec/utils: correct align value for interplay
- avcodec/vp56: Check for the bitstream end, pass error codes on
- avcodec/mjpegdec: Check remaining bitstream in ljpeg_decode_yuv_scan()
- avcodec/pngdec: Fix off by 1 size in decode_zbuf()
- libopenmpt: add missing avio_read return value check
- avcodec/bsf: Fix av_bsf_list_free()
- avcodec/omx: Do not pass negative value into av_malloc()
- avformat/avidec: skip odml master index chunks in avi_sync
- avcodec/mjpegdec: Check for rgb before flipping
- lavf/utils.c Protect against accessing entries[nb_entries]
- avutil/random_seed: Reduce the time needed on systems with very low
precission clock()
- swscale/swscale: Fix dereference of stride array before null check
- avutil/random_seed: Improve get_generic_seed() with higher precission clock()
- avformat/mp3dec: fix msan warning when verifying mpa header
- avformat/utils: Print verbose error message if stream count exceeds max_streams
- avformat/options_table: Set the default maximum number of streams to 1000
- lavf/chromaprint: Update for version 1.4
- avutil: Add av_image_check_size2()
- avformat: Add max_streams option
- avcodec/ffv1enc: Allocate smaller packet if the worst case size cannot
be allocated
- avcodec/mpeg4videodec: Fix undefined shifts in mpeg4_decode_sprite_trajectory()
- avformat/oggdec: Skip streams in duration correction that did not had
their duration set.
- avcodec/ffv1enc: Fix size of first slice
- ffplay: fix sws_scale possible out of bounds array access
- avfilter/vf_hwupload_cuda: Add min/max limits for the 'device' option

[bdubbs@…]

Fixed at revision 18274.