message: dbtool: Fix MySQL connection check
diff: @@ -36,7 +36,7 @@ bool DBConnection::isConnected()
  }
  else if(m_config.isMysql())
  {
  - querytext = "SHOW TABLES";
  + return m_db->isOpen();
  }
  else if(m_config.isPostgresql())
  {
  