OSV-2020-856 Use-of-uninitialized-value in deflate_slow

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18745 Crash type: Use-of-uninitialized-value Crash state: deflateslow deflate PlFlate::handleData...

graphicsmagick/coder_MIFF_fuzzer: Use-of-uninitialized-value in deflate_slow

Project: http://hg.code.sf.net/p/graphicsmagick/code Detailed report: https://oss-fuzz.com/testcase?key=5115066047791104 Project: graphicsmagick Fuzzer: libFuzzergraphicsmagickcoderMIFFfuzzer Fuzz target binary: coderMIFFfuzzer Job Type: libfuzzermsangraphicsmagick Platform Id: linux Crash Type:...