[Plugin: WP-UserOnline] Linked names to author pages

I wanted the names in the sidebar linked to the users’ author pages so I modified line 150 ($displayname) and added a line above it in wp-useronline.php to this if anyone cares to know: ??

$siteurl = get_bloginfo('url');
$displayname = '<a href="'.$siteurl.'/?author='.$current_user->ID.'">'.addslashes($current_user->display_name).'</a>';