scripted-diff: Use getInt<T> over get_int/get_int64

-BEGIN VERIFY SCRIPT-
 sed -i 's|\<get_int64\>|getInt<int64_t>|g' $(git grep -l get_int ':(exclude)src/univalue')
 sed -i 's|\<get_int\>|getInt<int>|g'       $(git grep -l get_int ':(exclude)src/univalue')
-END VERIFY SCRIPT-

src/qt/rpcconsole.cpp

@@ -457,7 +457,7 @@ void RPCExecutor::request(const QString &command, const WalletModel* wallet_mode
     {
         try // Nice formatting for standard-format error
         {
-            int code = find_value(objError, "code").get_int();
+            int code = find_value(objError, "code").getInt<int>();
             std::string message = find_value(objError, "message").get_str();
             Q_EMIT reply(RPCConsole::CMD_ERROR, QString::fromStdString(message) + " (code " + QString::number(code) + ")");
         }