--- watchdog_live.module	2012-02-22 16:39:15.000000000 +0200
+++ watchdog_live.module.org	2009-04-22 09:21:54.000000000 +0300
@@ -53,7 +53,7 @@ function watchdog_live_form_alter(&$form
     );
     $form['watchdog_live']['disabled'] = array(
       '#type' => 'checkbox', '#title' => t('Disable'),
-      '#default_value' => (isset($_SESSION['watchdog_live_disabled']) ? $_SESSION['watchdog_live_disabled'] : NULL),
+      '#default_value' => $_SESSION['watchdog_live_disabled']
     );
   }
 }