Fix Orphaned Wordpress User on Login

//Could probably use a little cleaning up, but it works.
$current_user = wp_get_current_user();
if ( !(0 == $current_user->ID) ){
    $user_info = get_userdata($current_user->ID);
    $user_array = $user_info->roles;
    if (empty($user_array)){
        $u = new WP_User( $current_user->ID );
        $u->add_role( 'subscriber' );
    }
}