message: Mem use optimizations
diff: @@ -752,8 +752,9 @@ void CTxMemPool::removeConflicts(const CTransaction &tx, std::list <CTransaction
  if (it != mapNextTx.end()) {
  const CTransaction &txConflict = *it->second;
  if (txConflict != tx) {
  + uint256 const txConflictHash = txConflict.GetHash();
  removeRecursive(txConflict, removed);
  - ClearPrioritisation(txConflict.GetHash());
  + ClearPrioritisation(txConflictHash);
  }
  }
  }
  