message: Remove unneeded cs_main lock in checkBalanceChanged.
diff: @@ -262,9 +262,6 @@ void WalletModel::emitBalanceChanged()
  void WalletModel::checkBalanceChanged()
  {
  - TRY_LOCK(cs_main, lockMain);
  - if (!lockMain) return;
  -
  CAmount newBalance = getBalance();
  CAmount newUnconfirmedBalance = getUnconfirmedBalance();
  CAmount newImmatureBalance = getImmatureBalance();
  