Why use while if only iterating once ?

[Venkat via Digitalmars-d-learn]

        while (1)
        {
            FLAGS f;
            switch (*p)
            {
            case 'U':
            case 'u':
                f = FLAGS.unsigned;
                goto L1;
            case 'l':
                f = FLAGS.long_;
                error("lower case integer suffix 'l' is not 
allowed. Please use 'L' instead");
                goto L1;
            case 'L':
                f = FLAGS.long_;
            L1:
                p++;
                if ((flags & f) && !err)
                {
                    error("unrecognized token");
                    err = true;
                }
                flags = cast(FLAGS)(flags | f);
                continue;
            default:
                break;
            }
            break;
}

The last break statement prevents the loop from returned for a 
second iteration. Then why use a while ?