libass: Attempting free in ass_drawing_free

Project: https://github.com/libass/libass.git Detailed report: https://clusterfuzz-external.appspot.com/testcase?key=6332129302544384 Project: libass Fuzzer: libFuzzerlibassfuzzer Fuzz target binary: libassfuzzer Job Type: libfuzzerasanlibass Platform Id: linux Crash Type: Attempting free Crash...