sparc: VIS mnemonics

Currently, if VIS is enabled by configure, it will also be enabled at
run-time regardless of its support in the hardware. Thus, masking VIS
usage as it is done in vis.h by constructing binary instructions is
pointless. Using normal VIS mnemonics in inline assembly allows to take
advantage of automatic register allocation, gets rid of register
variables, which are unsupported by suncc for SPARC, and improves code
readability.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
jpegls: check the scan offset

Prevent an out of array bound write.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
jpegls: return meaningful errors
jpegls: factorize return paths
lavfi doxy: add a page for lavfi.
doxy: add a section about versioning.
lavc doxy: add avcodec.h to the libavcodec group.
lavr doxy: add version.h to the lavr group
doxy: don't sort struct members alphabetically

The declaration order is more meanigful in most cases.
lavfi: rename AVFilterFormats.format_count to nb_formats

This is more consistent with naming in the rest of Libav.
af_aformat: cosmetics, fix indentation
Merge commit 'a5a0ef5e13a59ff53318a45d77c5624b23229c6f'

* commit 'a5a0ef5e13a59ff53318a45d77c5624b23229c6f':
  jpegls: return meaningful errors
  sparc: VIS mnemonics

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '4a4107b48944397c914aa39ee16a82fe44db8c4c'

* commit '4a4107b48944397c914aa39ee16a82fe44db8c4c':
  jpegls: factorize return paths

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'bc8c1cdc7bfe7b1fe56df812aabdac3de2555cec'

* commit 'bc8c1cdc7bfe7b1fe56df812aabdac3de2555cec':
  lavfi doxy: add a page for lavfi.
  jpegls: check the scan offset

Conflicts:
	libavcodec/jpeglsdec.c
	libavfilter/avfilter.h
	libavutil/avutil.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '40020e171a3549a2c0b65ce6f2649aec868872f2'

* commit '40020e171a3549a2c0b65ce6f2649aec868872f2':
  doxy: add a section about versioning.

Conflicts:
	libavutil/avutil.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '006ec64877fb638de4b15ae5fd969e22bd0f60ca'

* commit '006ec64877fb638de4b15ae5fd969e22bd0f60ca':
  lavr doxy: add version.h to the lavr group
  lavc doxy: add avcodec.h to the libavcodec group.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'e27f4b7cbf8a3fde313cfe4b3a1880bf5031e9ae'

* commit 'e27f4b7cbf8a3fde313cfe4b3a1880bf5031e9ae':
  doxy: don't sort struct members alphabetically

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'b01f6041f4260fba053c2f96ce1611ea77e833a0'

* commit 'b01f6041f4260fba053c2f96ce1611ea77e833a0':
  lavfi: rename AVFilterFormats.format_count to nb_formats

Conflicts:
	libavfilter/avfiltergraph.c
	libavfilter/filtfmts.c
	libavfilter/formats.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c5ab6088ad7b0dac461fb6757b038f5260e638e5'

* commit 'c5ab6088ad7b0dac461fb6757b038f5260e638e5':
  af_aformat: cosmetics, fix indentation

Merged-by: Michael Niedermayer <michaelni@gmx.at>
doc/fate: update server host key fingerprints

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