imagemagick/encoder_pix_fuzzer: Use-of-uninitialized-value in PushColormapIndex

Project: https://github.com/imagemagick/imagemagick.git Detailed report: https://oss-fuzz.com/testcase?key=5323738913439744 Project: imagemagick Fuzzer: libFuzzerimagemagickencoderpixfuzzer Fuzz target binary: encoderpixfuzzer Job Type: libfuzzermsanimagemagick Platform Id: linux Crash Type:...