OSV-2026-57 Heap-buffer-overflow in mkv::matroska_segment_c::TrackInit

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=475261418 Crash type: Heap-buffer-overflow READ 1 Crash state: mkv::matroskasegmentc::TrackInit mkv::matroskasegmentc::TrackInit mkv::matroskasegmentc::ParseTrackEntry...