openh264/decoder_fuzzer: Use-of-uninitialized-value in WelsDec::MapColToList0

Project: https://github.com/cisco/openh264.git Detailed report: https://oss-fuzz.com/testcase?key=5765968641392640 Project: openh264 Fuzzer: libFuzzeropenh264decoderfuzzer Fuzz target binary: decoderfuzzer Job Type: libfuzzermsanopenh264 Platform Id: linux Crash Type: Use-of-uninitialized-value...