configure: Check only for xcb

xcb-utils are not needed anymore.
oggenc: remove unneeded null check

The code would have segfaulted before if oggstream were NULL.

CC: libav-stable@libav.org
Bug-Id: CID 732218
mtv: improve header check and avoid division by zero

CC: libav-stable@libav.org
Bug-Id: CID 732203 / CID 732204
fbdev: Use av_strerror
jack: Use av_strerror
assdec: check av_new_packet return value

CC: libav-stable@libav.org
Bug-Id: CID 703626
bethsoftvid: simplify return handling

Fixes a double free in case of av_packet_new_side_data() failure.
avformat/mpjpeg: make boundary tag user customizable

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/utils: support more AVC Intra formats without SPS/PPS header

add support for AVC Intra 50 720p and 1080p without SPS/PPS header in mxf and mov demuxers. I got the SPS/PPS tables from libbmx.

Reviewed-by: tomas.hardin@codemill.se
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'a9179b5bd6f143b4a7ff48bb0d00c8f0a7cafb4b'

* commit 'a9179b5bd6f143b4a7ff48bb0d00c8f0a7cafb4b':
  configure: Check only for xcb

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'b3d11437ca55d81eeb10c923343ad69b73895fa8'

* commit 'b3d11437ca55d81eeb10c923343ad69b73895fa8':
  oggenc: remove unneeded null check

See: a147c1b2b125c26cd2c5105a7f274a597de37731
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'f64d7e919eabd427f3e6dd4a1219e448c78deb42'

* commit 'f64d7e919eabd427f3e6dd4a1219e448c78deb42':
  mtv: improve header check and avoid division by zero

Conflicts:
	libavformat/mtv.c

See: 8b9b6332dfeb169098c8ab1351d66fc5b474dd55
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '043ea6f7bfc59399b6b3659da785ec4cc68a008e'

* commit '043ea6f7bfc59399b6b3659da785ec4cc68a008e':
  fbdev: Use av_strerror

Conflicts:
	libavdevice/fbdev_dec.c

See: f6b56b1f26a1e40a47d85d24b42cd5475cd3b04f
Merged-by: Michael Niedermayer <michaelni@gmx.at>
avdevice/fbdev_dec: use errno instead of ret for av_log

Should fix printing the wrong value

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '2cd28693a59050717cb7da6cb229e606b1dee356'

* commit '2cd28693a59050717cb7da6cb229e606b1dee356':
  jack: Use av_strerror

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'e9ba3098319f78c91470c05da988d865491852c5'

* commit 'e9ba3098319f78c91470c05da988d865491852c5':
  assdec: check av_new_packet return value

Conflicts:
	libavformat/assdec.c

See: 7c9f9685ae2d45d5bbb939483a01266622e8f14c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '84bf64d3598c98a748e609195358ea04b0cfd140'

* commit '84bf64d3598c98a748e609195358ea04b0cfd140':
  bethsoftvid: simplify return handling

See: 5ee6527c4386c76a0aae1b07842d6676ee1e91d1
Merged-by: Michael Niedermayer <michaelni@gmx.at>
mxfenc: fix indentation after last commit

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Autodetect libxcb.
lavc/utils: Make pix_fmt desc pointer const.

Fixes an "initialization discards qualifiers from pointer target type" warning.