Merge commit '55019715785790836f60870180e1764b06e6591c'

* commit '55019715785790836f60870180e1764b06e6591c':
  hevc_filter: drop more redundant checks

Conflicts:
	libavcodec/hevc_filter.c

No change, as the removed checks where not in FFmpeg

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