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=5689395047301120 Project: graphicsmagick Fuzzer: libFuzzergraphicsmagickcoderMIFFfuzzer Fuzz target binary: coderMIFFfuzzer Job Type: libfuzzermsangraphicsmagick Platform Id: linux Crash Type:...