Merge commit 'c6303f8d'

* commit 'c6303f8d':
  yop: simplify/sanitize the decoding loop
  c93: set palette_has_changed.
  bmp: cosmetics, reformat
  hlsenc: Don't duplicate a string constant

Conflicts:
	libavcodec/bmp.c
	tests/ref/fate/yop

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