OSV-2023-1115 Use-of-uninitialized-value in fp_uninit

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=63867 Crash type: Use-of-uninitialized-value Crash state: fpuninit cryptofuzz::module::libecc::OpECCValidatePubkey cryptofuzz::ExecutorBase::callM...