Merge commit '197ae68e78784524a7ccf97a3c301092715305d3'

* commit '197ae68e78784524a7ccf97a3c301092715305d3':
  Drop unnecessary unary.h #includes

Merged-by: Clément Bœsch <clement@stupeflix.com>

diff --cc libavcodec/h263.c
Simple merge

diff --cc libavcodec/ituh263enc.c
Simple merge

diff --cc libavcodec/on2avc.c
Simple merge