message: bench: Use existing NodeContext in DuplicateInputs
diff: @@ -25,7 +25,8 @@ static void DuplicateInputs(benchmark::Bench& bench)
  CMutableTransaction naughtyTx{};
  LOCK(cs_main);
  - CBlockIndex* pindexPrev = ::ChainActive().Tip();
  + assert(std::addressof(::ChainActive()) == std::addressof(testing_setup->m_node.chainman->ActiveChain()));
  + CBlockIndex* pindexPrev = testing_setup->m_node.chainman->ActiveChain().Tip();
  assert(pindexPrev != nullptr);
  block.nBits = GetNextTargetRequired(pindexPrev, block.IsProofOfStake(), chainparams.GetConsensus());
  block.nNonce = 0;
  