OSV-2020-290 Use-of-uninitialized-value in rawspeed::RawImageData::checkMemIsInitialized

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18877 Crash type: Use-of-uninitialized-value Crash state: rawspeed::RawImageData::checkMemIsInitialized PhaseOneDecompressor.cpp posixmemalign...