Non-standard PJLink reply to LAMP command

PJLink standard: "%1LAMP=HHHHH P"
where: H = lamp hours : P = Lamp power on/off status
(NOTE: "HHHHH P" may be repeated with a space separator for multiple lamps in equipment)

example:
"%1LAMP=38 0"
where: 38 = lamp1 hours of use : 0 = lamp currently OFF

ViewSonic Pro8500:
"%1LAMP=38"
where: 38 = lamp1 hours of use : Missing lamp1 power on/off status

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2017-11-23 16:14:19,840 openlp.core.lib.projector.pjlink1 DEBUG
(192.168.2.2) get_data(): Checking new data "%1LAMP=38"

2017-11-23 16:14:19,840 openlp.core.lib.projector.pjlink1 DEBUG
(192.168.2.2) Processing command "LAMP"

2017-11-23 16:14:19,840 openlp.core.OpenLP DEBUG
Entering hook_exception

2017-11-23 16:14:19,841 root CRITICAL
Traceback (most recent call last):
  File "openlp\core\lib\projector\pjlink1.py", line 436, in get_data
  File "openlp\core\lib\projector\pjlink1.py", line 593, in process_command
  File "openlp\core\lib\projector\pjlink1.py", line 611, in process_lamp
IndexError: list index out of range