Minor - define global to remove notice

main/webservices/webservice_user.php

@@ -222,6 +222,7 @@ class WSUser extends WS {
 	 * @return mixed New user id generated by the system, WSError otherwise
 	 */
 	protected function createUserHelper($firstname, $lastname, $status, $login, $password, $encrypt_method, $user_id_field_name, $user_id_value, $visibility, $email, $language, $phone, $expiration_date, $extras) {
+        global $api_failureList;
 		// Add the original user id field name and value to the extra fields if needed
 		$extras_associative = array();
 		if($user_id_field_name != "chamilo_user_id") {
@@ -332,6 +333,7 @@ class WSUser extends WS {
 	 * @return mixed True if user was successfully updated, WSError otherwise
 	 */
 	protected function editUserHelper($user_id_field_name, $user_id_value, $firstname, $lastname, $status, $loginname, $password, $encrypt_method, $email, $language, $phone, $expiration_date, $extras) {
+        global $api_failureList;
 		$user_id = $this->getUserId($user_id_field_name, $user_id_value);
 		if($user_id instanceof WSError) {
 			return $user_id;