[-] Installer : fix demo product insertion

git-svn-id: http://dev.prestashop.com/svn/v1/branches/1.5.x@9227 b9a71923-0436-4b27-9f14-aed3839534dd

classes/AdminController.php

@@ -1515,6 +1515,11 @@ class AdminControllerCore extends Controller
 		return !count($this->_errors) ? true : false;
 	}
 
+	/**
+	 * Delete multiple items
+	 *
+	 * @param array $boxes ids of the item to be processed
+	 */
 	protected function bulkDelete($boxes)
 	{
 		if (is_array($boxes) && !empty($boxes))