Code simplification around constants used

Co-authored-by: pablomartin4btc <[email protected]>

src/qt/rpcconsole.cpp

@@ -419,10 +419,9 @@ void RPCExecutor::request(const QString &command, const WalletModel* wallet_mode
         std::regex invalidRegex("generate[\\s\\(]+.*");
         std::smatch match;
         if (std::regex_match(executableCommand, match, validRegex)) {
-            std::string nblocks=match[1];
-            std::string maxtries=match[2];
-            if (nblocks=="") nblocks = "1";
-            if (maxtries=="") maxtries = "1000000";
+            const std::string nblocks{match.str(1) == "" ? "1" : match.str(1)};
+            const std::string maxtries{match.str(2) == "" ? "1000000" : match.str(2)};
+
             if (!RPCConsole::RPCExecuteCommandLine(m_node, result, "getnewaddress\n", nullptr, wallet_model)) {
                 Q_EMIT reply(RPCConsole::CMD_ERROR, QString("Parse error: unbalanced ' or \""));
             }