I need something roughly opposite die_on_bad_params. I need to know
what vars (or loops) in the template are NOT populated at output time.
I've taken over a project where I need to know if I am completely
populating the templates.
Any ideas? I could do a bunch of query looping and call param('name')
on all the vars that query gives me, but it seems like I wouldn't be the
first to want this. Is there something already written?