Patch to not show view_pane empty argument value in panels admin view pane content

Currently, if an argument on a panel pane is empty, it still takes priority over the pane_description text

For example, I have a view pane with description:

Headline, 403x250 image, teaser and 2 related links

And an argument for taxonomy term id, exposed and set via pane config.

However, if the panel pane config form is saved, the admin pane text becomes:
Category:
The pane description is gone and an empty "argument name: no value" text shown instead.

The attached patch fixes the issue with a simple if(!empty($value)){} check

cheers,

DT

P.S Thanks for the awesome module work, excellent stuff.