Fix JS crash if name is undefined

js/crm.payment.js

@@ -372,11 +372,13 @@
       // Most checkboxes get names like: "custom_63[1]" but "onbehalf" checkboxes get "onbehalf[custom_63][1]". We change them to "custom_63" and "onbehalf[custom_63]".
       $('div#priceset input[type="checkbox"], fieldset.crm-profile input[type="checkbox"], #on-behalf-block input[type="checkbox"]').each(function() {
         var name = $(this).attr('name');
-        $(this).attr('data-name', name);
-        $(this).attr('name', name.replace('[' + name.split('[').pop(), ''));
-        $(this).removeAttr('required');
-        $(this).removeClass('required');
-        $(this).removeAttr('aria-required');
+        if (name !== undefined) {
+          $(this).attr('data-name', name);
+          $(this).attr('name', name.replace('[' + name.split('[').pop(), ''));
+          $(this).removeAttr('required');
+          $(this).removeClass('required');
+          $(this).removeAttr('aria-required');
+        }
       });
 
       // Default email validator accepts test@example but on test@example.org is valid (https://jqueryvalidation.org/jQuery.validator.methods/)