$0 value line items should be allowed
Created by: lcdservices
There is a form rule in place here: https://github.com/JMAConsulting/biz.jmaconsulting.lineitemedit/blob/master/CRM/Lineitemedit/Form/Add.php#L100
...which prevents line item totals of $0. but that is a legitimate value -- both in the construction of price sets for events, and in the case where a discount is extended on a line item that normally would have a value. is there a reason that rule is in place?