smoothstreamingenc: Fix a memory leak on errors

Signed-off-by: Martin Storsjö <martin@martin.st>
libfdk-aacdec: Decode the first AAC frame to reliably identify the bitstream

For implicit signaling cases (as possible for Spectral Band Replication
and Parametric Stereo Tools), the decoder must decode the first frame to
correctly identify the stream configuration (as called from
avformat_find_stream_info). The mechanism for this is built-in and only
requires adding CODEC_CAP_CHANNEL_CONF to the libfdk-aacdec AVCodec
struct.

Signed-off-by: Omer Osman <omer.osman@iis.fraunhofer.de>
Signed-off-by: Martin Storsjö <martin@martin.st>
Merge commit 'a863c97e99bf30a88baa74f83bab9e3ab25984dc'

* commit 'a863c97e99bf30a88baa74f83bab9e3ab25984dc':
  smoothstreamingenc: Fix a memory leak on errors

See: a53c5d454ee608fd539e5c02ade3f246470d1cb2
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '1e9a93bfca2c2f43a07e01f2ef9fd5cbafe6c22d'

* commit '1e9a93bfca2c2f43a07e01f2ef9fd5cbafe6c22d':
  libfdk-aacdec: Decode the first AAC frame to reliably identify the bitstream

Conflicts:
	libavcodec/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
doc/Doxyfile: use 5 columns for alphabetical index

This reverts a hunk from 671005558a295945f5d4cfd1abca6832af479c0b
Reduces diff to what we use on the server
Suggested-by: Timothy Gu
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>