graphicsmagick:coder_P7_fuzzer: Use-of-uninitialized-value in WritePNMImage

Project: http://hg.code.sf.net/p/graphicsmagick/code Detailed Report: https://oss-fuzz.com/testcase?key=5008645446828032 Project: graphicsmagick Fuzzing Engine: libFuzzer Fuzz Target: coderP7fuzzer Job Type: libfuzzermsangraphicsmagick Platform Id: linux Crash Type: Use-of-uninitialized-value Cra...