configure: Fix enabling memalign_hack automatically

simd_align_16 is a configure item that can be enabled or disabled,
it's not a variable containing a list of other configure items
as need_memalign previously. This was broken in eba2233b5.

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
avcodec/libvorbisenc: Give CODEC_CAP_SMALL_LAST_FRAME to libvorbis encoder.

The libvorbis encoder already supports a small last frame, but the layer
above doesn't know that because we didn't register the small last frame
capability.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '7813e6752bdab38a5686c301e869ee71d97bce69'

* commit '7813e6752bdab38a5686c301e869ee71d97bce69':
  configure: Fix enabling memalign_hack automatically

Conflicts:
	configure

See: 3d93ba562243b6d8afac3c875c05304d41da94bf
Merged-by: Michael Niedermayer <michaelni@gmx.at>
doc/writing_filters: use a more portable sed command in the walk-through
doc/writing_filters: fix reference to Lenna image
Support raw dvdsub palette as stored on normal dvd's

This is how the palette is stored on dvd's. Currently
only xbmc passes the palette information to libavcodec
this way.
Check return value of avio_seek and avoid modifying state if it fails

The code still modifies state if the timestamp is not found. Not
sure exactly how to avoid that.
asf hacks
if av_read_packet returns AVERROR_IO, we are done. ffmpeg's codecs might or might not handle returning any completed demuxed packets correctly
added: Ticket #7187, TV Teletext support for DVB EBU Teletext streams
Don't accept mpegts PMT that isn't current
Don't reparse PMT unless it's version has changed
Read PID timestamps as well as PCR timestamps to find location in mpegts stream
Get stream durations using read_timestamp
changed: allow 4 second skew between streams in mov before attempting to seek
fixed: memleak in mpegts demuxer on some malformed (??) mpegts files with too large pes packets

at-visions sample file brokenStream.mpg
Speed up mpegts av_find_stream_info
dxva-h264 Fix dxva playback of streams that don't start with an I-Frame.
add public version of ff_read_frame_flush

We need this since we sometimes seek on the
input stream behind ffmpeg's back. After this
all data need to be flushed completely.