} else if (devc->state == GET_PACKET) {
/* Read a packet from the device. */
ret = serial_read_nonblocking(serial, devc->buf + devc->buflen,
- 4 - devc->buflen);
+ 4 - devc->buflen);
if (ret < 0) {
sr_err("Error reading packet: %d.", ret);
return TRUE;