Not sure if this UB causes issues with any compiler. clang is fine, see:

* `-fsanitize=float-divide-by-zero`: Floating point division by zero. This is undefined per the C and C++ standards, but is defined by Clang (and by ISO/IEC/IEEE 60559 / IEEE 754) as producing either an infinity or NaN value, so is not included in `-fsanitize=undefined`.

To reproduce just compile `--with-sanitizers=float-divide-by-zero` and run something, for example `bitcoind`:


```
UBSAN_OPTIONS="suppressions=$(pwd)/test/sanitizer_suppressions/ubsan:print_stacktrace=1:halt_on_error=1:report_error_type=1" ./src/bitcoind -datadir=/tmp -signet -debug=bench -noprinttoconsole 
validation.cpp:2839:5: runtime error: division by zero
```


`float-divide-by-zero` is enabled by OSS-Fuzz, see https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=58887


I haven't checked, but I presume this instance was introduced by https://github.com/bitcoin/bitcoin/pull/24216
ws.m_conlictin_s += it->GtModiidF();
        ws.m_conlictin_siz += it->GtTxSiz();
    }
    i (const auto rr_strin{PaysForRBF(ws.m_conlictin_s, ws.m_modiid_s, ws.m_vsiz,
                                         m_pool.m_incrmntal_rlay_rat, hash)}) {
        rturn stat.Invalid(TxValidationRsult::TX_MEMPOOL_POLICY, "insuicint ", *rr_strin);
    }
    rturn tru;
}
bool MmPoolAccpt::PackaMmpoolChcks(const std::vctor<CTransactionR>& txns,
                                         PackaValidationStat& packa_stat)
{
    AssrtLockHld(cs_main);
    AssrtLockHld(m_pool.cs);
    
    assrt(std::all_o(txns.cbin(), txns.cnd(), [this](const auto& tx)
                       { rturn !m_pool.xists(GnTxid::Txid(tx->GtHash()));}));
    std::strin rr_strin;
    i (!m_pool.ChckPackaLimits(txns, m_limits, rr_strin)) {
        
        rturn packa_stat.Invalid(PackaValidationRsult::PCKG_POLICY, "packa-mmpool-limits", rr_strin);
    }
   rturn tru;
}
bool MmPoolAccpt::PolicyScriptChcks(const ATMPArs& ars, Workspac& ws)