Log Message:
Changes 2.4.4:
* doc: correct license template for t2h.pm
* avformat: replace some odd 30-60 rates by higher less odd ones in  \ 
get_std_framerate()
* swscale: fix yuv2yuvX_8 assembly on x86
* avcodec/hevc_ps: Check num_long_term_ref_pics_sps
* avcodec/mjpegdec: Fix integer overflow in shift
* avcodec/hevc_ps: Check return code from pps_range_extensions()
* avcodec/rawdec: Check the return code of avpicture_get_size()
* avcodec/pngdec: Check IHDR/IDAT order