karchive:k7z_fuzzer: Use-of-uninitialized-value in QUtf8::convertToUnicode

Detailed Report: https://oss-fuzz.com/testcase?key=6333009820450816 Project: karchive Fuzzing Engine: libFuzzer Fuzz Target: k7zfuzzer Job Type: libfuzzermsankarchive Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash State: QUtf8::convertToUnicode...