gnutls: Use-of-uninitialized-value in __gmpz_limbs_finish

Project: https://gitlab.com/gnutls/gnutls.git Detailed report: https://oss-fuzz.com/testcase?key=4887173172035584 Project: gnutls Fuzzer: libFuzzergnutlspskclientfuzzer Fuzz target binary: gnutlspskclientfuzzer Job Type: libfuzzermsangnutls Platform Id: linux Crash Type: Use-of-uninitialized-valu...