views Fatal error: Call to a member function use_group_by() on a non-object

When adding the "Full address" field to a View, the following error is returned:

views Fatal error: Call to a member function use_group_by() on a non-object in views/includes/handlers.inc on line 296

After a bit of searching, I found a similar old issue in the Date module where it said it was caused by using the ui_name() function. Removing the call to this function in that handler and returning an empty string instead (same as views_handler_field.inc does) fixed the problem.

I made that change and a similar one to another civicrm views handler. See attached patch

FYI, using Views 7.x-3.3, Civicrm 4.1.5