graphicsmagick:coder_J2C_fuzzer: Segv on unknown address in jpc_pchglist_destroy

Detailed Report: https://oss-fuzz.com/testcase?key=6230132319191040 Project: graphicsmagick Fuzzing Engine: libFuzzer Fuzz Target: coderJ2Cfuzzer Job Type: libfuzzerasangraphicsmagick Platform Id: linux Crash Type: Segv on unknown address Crash Address: Crash State: jpcpchglistdestroy...