avfilter/af_asyncts: use llabs for int64_t
long may not be 64 bit on all platforms; so labs on int64_t is unsafe.
This fixes a warning reported in:
http://fate.ffmpeg.org/log.cgi?time=20150905071512&log=compile&slot=i386-darwin-clang-polly-3.7
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit d74123d03e
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>