* qatar/master:
  lavf: prevent crash in av_open_input_file() if ap == NULL.
  more Changelog additions
  lavf: add a forgotten NULL check in convert_format_parameters().
  Fix build if yasm is not available.
  H.264: Add x86 assembly for 10-bit MC Chroma H.264 functions.

Conflicts:
	Changelog
Merged-by: Michael Niedermayer <michaelni@gmx.at>