Skip decklink_common_c.h when running make checkheaders.
tests/fate-run.sh: Cat .err file in case of error with V>0

This may make fate failures where only the console output is available
easier to analyze

Suggested-by: Andreas Cadhalpun
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/libvpxdec: don't check for formats other than i420 when vp9 decoding is disabled

Should fix ticket #3958.

Reviewed-by: James Zern <jzern@google.com>
Signed-off-by: James Almer <jamrial@gmail.com>
x86/videodsp: fix warning about discarded 'const' qualifier

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Almer <jamrial@gmail.com>
hevc: remove unneeded buffer.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
hevc: move intermediate bidir buffer

Other buffers are already there.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
configure: support --disable-sdl

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
configure: reindent the --disable-sdl related code

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
configure: fail if SDL is unavailable and --enable-sdl is specified

Reviewed-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
configure: Check if "-D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600" is needed for localtime_r()

Fixes build with musl

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