OSV-2026-1039 Index-out-of-bounds in iusace_estimate_scfs_chan

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=531479957 Crash type: Index-out-of-bounds Crash state: iusaceestimatescfschan iusacequantizespec iusacefdencode...