OSV-2020-2005 UNKNOWN READ in grk::param_qcd::set_irrev_quant

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26207 Crash type: UNKNOWN READ Crash state: grk::paramqcd::setirrevquant grk::j2kreadSPCodSPCoc grk::j2kreadcod...