OSV-2020-827 Use-of-uninitialized-value in llvm_ks::isIntN

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22920 Crash type: Use-of-uninitialized-value Crash state: llvmks::isIntN X86AsmBackend::applyFixup llvmks::MCAssembler::layout...

keystone:fuzz_asm_x86_64: Use-of-uninitialized-value in llvm_ks::isIntN

Detailed Report: https://oss-fuzz.com/testcase?key=6316147845890048 Project: keystone Fuzzing Engine: libFuzzer Fuzz Target: fuzzasmx8664 Job Type: libfuzzermsankeystone Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash State: llvmks::isIntN X86AsmBackend::applyFixup...