[Update]Show userLogin if empty name

wp-content/themes/nap/functions.php

@@ -680,7 +680,11 @@ function get_logged_user() {
     if (is_user_logged_in()) {
         global $current_user;
         get_currentuserinfo();
+        if($current_user->user_lastname || $current_user->user_firstname){
             echo $current_user->user_lastname . ' ' . $current_user->user_firstname;
+        }else{
+            echo $current_user->user_login;
+        }
         echo '<span class = "logout"><a href="' .  wp_logout_url( home_url() ) . '">déconnexion</a></span>';
     } else {
         echo '<a class="login" href="#">accès pro</a>';