CRM_Contact_Selector::getRows() has a variable $empty that is never initialized

On line 648 it gets set to false under certain conditions (almost always) and then is checked down on line 738, but it's never initialized.

I'm assuming this was put in as some kind of workaround. If so, suggest adding $empty = true outside the inner loop line 594
foreach ($names as $property) {
...
}