keystone/fuzz_asm_hex: Use-of-uninitialized-value in getFixupNoBits

Detailed report: https://oss-fuzz.com/testcase?key=5695931230453760 Project: keystone Fuzzer: libFuzzerkeystonefuzzasmhex Fuzz target binary: fuzzasmhex Job Type: libfuzzermsankeystone Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash State: getFixupNoBits...