Merge commit 'b9f76d19d81fbc7f088536f966c2d3dc23c34ddc'

* commit 'b9f76d19d81fbc7f088536f966c2d3dc23c34ddc':
  hevc_ps: make sure failing to decode an SPS always returns an error

Conflicts:
	libavcodec/hevc_ps.c

See: 15893adbdb
Merged-by: Michael Niedermayer <michael@niedermayer.cc>