Filter rewrite never gets applied to values like 0 considered empty by PHP

I have changed !empty to isset and created the patch please review it

Steps seem pretty clear to add a simple test case or additional assertion.

Since the change was done without question @deepali sardana to receive credit please turn to an MR and add test coverage

Actually reverted because isset() is always true.

Automatically closed - issue fixed for 2 weeks with no activity.