avcodec/ffwavesynth: Simplify lcg_seek(), avoid negative case
authorMichael Niedermayer <michael@niedermayer.cc>
Fri, 21 Jun 2019 20:41:25 +0000 (22:41 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Mon, 8 Jul 2019 09:43:31 +0000 (11:43 +0200)
commit73885bf3e19651b2316eac6690167095039603b2
treeb973742afe46cdaec7290bdf0db0c01f9a74eb4d
parent24ea2679e2c93891a6a4c5fbddad6c27e459c140
avcodec/ffwavesynth: Simplify lcg_seek(), avoid negative case

Fixes: negation of -9223372036854775808 cannot be represented in type 'int64_t' (aka 'long'); cast to an unsigned type to negate this value to itself
Fixes: 15289/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5709034499342336

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 8c022099351c04ae21e0b8696ea71a690ed03cd2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/ffwavesynth.c