Log Message:
Changes 1.2.9:
* swresample/swresample: fix sample drop loop end condition
* avcodec/h264: Check mode before considering mixed mode intra prediction
* avformat/mpegts: Check desc_len / get8() return code
* avcodec/smc: fix off by 1 error
* avcodec/qpeg: fix off by 1 error in MV bounds check
* avcodec/gifdec: factorize interleave end handling out
* avcodec/cinepak: fix integer underflow
* avcodec/pngdec: Calculate MPNG bytewidth more defensively
* avcodec/pngdec: Check bits per pixel before setting monoblack pixel format
* avcodec/tiff: more completely check bpp/bppcount
* avcodec/mmvideo: Bounds check 2nd line of HHV Intra blocks
* avcodec/utils: Add case for jv to avcodec_align_dimensions2()
* more...