insure default_poller and default_site have a default value

include/global_settings.php

@@ -254,6 +254,7 @@ $settings = array(
 			'friendly_name' => __('Default Site'),
 			'description' => __('The default Site for all new Devices.'),
 			'method' => 'drop_sql',
+			'default' => '1',
 			'none_value' => __('None'),
 			'sql' => 'SELECT id, name FROM sites ORDER BY name',
 			),
@@ -261,6 +262,7 @@ $settings = array(
 			'friendly_name' => __('Default Poller'),
 			'description' => __('The default Poller for all new Devices.'),
 			'method' => 'drop_sql',
+			'default' => '1',
 			'none_value' => __('None'),
 			'sql' => 'SELECT id, name FROM poller ORDER BY name',
 			),