Log Message:
Changes 1.2.10:
* avcodec/svq1dec: zero terminate embedded message before printing
* avcodec/utils: Align dimensions by at least their chroma sub-sampling factors.
* avcodec/dnxhddec: treat pix_fmt like width/height
* avcodec/dxa: check dimensions
* avcodec/dirac_arith: fix integer overflow
* avcodec/diracdec: Tighter checks on CODEBLOCKS_X/Y
* avcodec/diracdec: Use 64bit in calculation of codeblock coordinates
* postproc: fix qp count
* postproc/postprocess: fix quant store for fq mode
* avcodec/h264_slice: Clear table pointers to avoid stale pointers