OSV-2020-1362 Use-of-uninitialized-value in LibRaw::init_fuji_block

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24016 Crash type: Use-of-uninitialized-value Crash state: LibRaw::initfujiblock LibRaw::fujidecodestrip LibRaw::fujidecodeloop...