Merge commit 'f6b6d6ac'

* commit 'f6b6d6ac':
  vf_frei0r: use the name 's' for the pointer to the private context
  vf_format: use the name 's' for the pointer to the private context
  vf_fieldorder: use the name 's' for the pointer to the private context
  vf_fieldorder: cosmetics, remove an extra linebreak

Conflicts:
	libavfilter/vf_frei0r.c

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