imagemagick/encoder_mvg_fuzzer: Use-of-uninitialized-value in ApplyPixelCompositeMask

Project: https://github.com/imagemagick/imagemagick.git Detailed report: https://oss-fuzz.com/testcase?key=5653817912197120 Project: imagemagick Fuzzer: libFuzzerimagemagickencodermvgfuzzer Fuzz target binary: encodermvgfuzzer Job Type: libfuzzermsanimagemagick Platform Id: linux Crash Type:...