PHP Error on Frontend (Notice: Undefined Index)

Hi,
found an easily reproducible error. When the passcode only mode is enabled, the frontend throws out errors in rsvp_frontend.inc.php in lines 430 and 431.

From a quick scan of the code it is likely because the code, as it stand, checks for the Name and Surname regardless, even if the passcode only option is enabled.
As a quick workaround I have implemented an added check as follow:

	if(!$passcodeOnlyOption){
	  $firstName = $_REQUEST['firstName'];
	  $lastName = $_REQUEST['lastName'];
	}

Please, let me know if an update is expected to be pushed soon (haven’t checked if the workaround breaks anything I am not using right now, but it shouldn’t).

Thanks for all your work on this!