vc1: Do not return an error when skipping b frames

This caused mpv (and possibly others) to fallback to software decoding after
seeking a VC1 stream.

Bug-Id: 667

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
ffserver: free nacl as needed

Should fix FFmpeg Coverity Scan issue #732268

Signed-off-by: Reynaldo H. Verdejo Pinochet <r.verdejo@sisa.samsung.com>
ffserver: free AVStream st before wiping context

Should fix FFmpeg Coverity Scan issue #732269

Signed-off-by: Reynaldo H. Verdejo Pinochet <r.verdejo@sisa.samsung.com>
ffserver: fix missing frees at connection setup

Should fix FFmpeg Coverity Scan issue #732266 and some of #732265

Signed-off-by: Reynaldo H. Verdejo Pinochet <r.verdejo@sisa.samsung.com>
Merge commit 'cdf6eb5a9710566be217a3f17d3d94ac4e4d2662'

* commit 'cdf6eb5a9710566be217a3f17d3d94ac4e4d2662':
  vc1: Do not return an error when skipping b frames

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/vc1dec: print debug message if a b frame without reference is skiped

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