message: remove unnecessary casts and use braced initialization
diff: @@ -347,7 +347,7 @@ void CChainState::MaybeUpdateMempoolForReorg(
  AssertLockHeld(::cs_main);
  const CTransaction& tx = it->GetTx();
  LockPoints lp = it->GetLockPoints();
  - bool validLP = TestLockPointValidity(m_chain, &lp);
  + const bool validLP{TestLockPointValidity(m_chain, &lp)};
  CCoinsViewMemPool view_mempool(&CoinsTip(), *m_mempool);
  if (!CheckFinalTx(m_chain.Tip(), tx, flags)
  || !CheckSequenceLocks(m_chain.Tip(), view_mempool, tx, flags, &lp, validLP)) {
  @@ -361,8 +361,8 @@ void CChainState::MaybeUpdateMempoolForReorg(
  continue;
  const Coin &coin = CoinsTip().AccessCoin(txin.prevout);
  assert(!coin.IsSpent());
  - unsigned int nMemPoolHeight = m_chain.Tip()->nHeight + 1;
  - if (coin.IsSpent() || (coin.IsCoinBase() && ((signed long)nMemPoolHeight) - coin.nHeight < COINBASE_MATURITY)) {
  + const auto mempool_spend_height{m_chain.Tip()->nHeight + 1};
  + if (coin.IsSpent() || (coin.IsCoinBase() && mempool_spend_height - coin.nHeight < COINBASE_MATURITY)) {
  should_remove = true;
  break;
  }
  