mpg123:read_fuzzer: Use-of-uninitialized-value in plain_fullread

Detailed Report: https://oss-fuzz.com/testcase?key=5858840405475328 Project: mpg123 Fuzzing Engine: libFuzzer Fuzz Target: readfuzzer Job Type: libfuzzermsanmpg123 Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash State: plainfullread defaultinit INT123openstream...