Notice on Debug Mode

Hi.

I just installed the plugin, and having the WordPress debug mode activated, a notice raises on every page load:

Notice: Undefined index: nospamnx_blacklist_global_update in /media/Datos/Joan/Desarrollo/web/diversexxx/web/wp-content/plugins/nospamnx/nospamnx.php on line 516

I’m using WordPress 3.5.1 , NoSpamNX 5.1.9 , PHP Version 5.3.10-1ubuntu3.5 , and the WordPress debug mode activated at wp-config.php by:

define('WP_DEBUG',true);
define('WP_DEBUG_LOG',true);
define('WP_DEBUG_LOG',true);
define('WP_DEBUG_DISPLAY',true);
@ini_set('display_errors',1);
define('SCRIPT_DEBUG',false);

Thanks for your plugin.

https://www.ads-software.com/extend/plugins/nospamnx/