imagemagick/ping_png48_fuzzer: Use-of-uninitialized-value in read_user_chunk_callback

Project: https://github.com/imagemagick/imagemagick.git Detailed report: https://oss-fuzz.com/testcase?key=5309683683295232 Project: imagemagick Fuzzer: libFuzzerimagemagickpingpng48fuzzer Fuzz target binary: pingpng48fuzzer Job Type: libfuzzermsanimagemagick Platform Id: linux Crash Type:...