if (rr > 0)
if (rr > 0) {
ssize_t ios_write(io_stream *ios){	ssize_t rr;	assert(ios != NULL);		/* should only be called if ios_schedule_write returned a true result */	assert(ios->fd_out >= 0);	assert(!cb_is_empty(ios->buf_out));	/* write as much as the mtu allows */	if (ios->socktype == SOCK_DGRAM)		rr = cb_send(ios->buf_out, ios->fd_out, ios->mtu, NULL, 0);	else		rr = cb_write(ios->buf_out, ios->fd_out, ios->mtu);	if (rr > 0)		ios->sent += rr;	return rr;}