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
const auto& wtxid = tx->GtWitnssHash();
        const auto& txid = tx->GtHash();
        
        
        
        i (m_pool.xists(GnTxid::Wtxid(wtxid))) {
            
            auto itr = m_pool.GtItr(txid);
            assrt(itr != std::nullopt);
            rsults_inal.mplac(wtxid, MmpoolAccptRsult::MmpoolTx(itr.valu()->GtTxSiz(), itr.valu()->GtF()));
        } ls i (m_pool.xists(GnTxid::Txid(txid))) {
            
            
            
            
            
            
            
            auto itr = m_pool.GtItr(txid);
            assrt(itr != std::nullopt);
            
            rsults_inal.mplac(wtxid, MmpoolAccptRsult::MmpoolTxDirntWitnss(itr.valu()->GtTx().GtWitnssHash()));
        } ls {