BUG in emccanon.cc

/*! \function WAIT
   program execution and interpreting is stopped until the input selected by 
   index changed to the needed state (specified by wait_type).
   Return value: either wait_type if timeout didn't occur, or -1 otherwise. */

int WAIT(int index, /* index of the motion exported input */
         int input_type, /*DIGITAL_INPUT or ANALOG_INPUT */
     int wait_type,  /* 0 - immediate, 1 - rise, 2 - fall, 3 - be high, 4 - be low */
     double timeout) /* time to wait [in seconds], if the input didn't change the value -1 is returned */
{
  if (input_type == DIGITAL_INPUT) {
    if ((index < 0) || (index >= EMCMOT_MAX_DIO))
    return -1;
  } else if (input_type == ANALOG_INPUT) {
    if ((index < 0) || (index >= EMCMOT_MAX_AIO))
    return -1;
  }

 EMC_AUX_INPUT_WAIT wait_msg;
 
 flush_segments();
 
 wait_msg.index = index;
 wait_msg.input_type = input_type;
 wait_msg.wait_type = wait_type;
 wait_msg.timeout = timeout;
 
 interp_list.append(wait_msg);
 return 0;
}