Preview Email v3.0.1

Fixes the Order Confirmation preview blanking on pickup, virtual and other orders that have no delivery address. Those orders set the delivery address to false; the preview now shows it as n/a, the same as the confirmation email Zen Cart actually sends for them.

Nothing else changed. The product lines (including the model number, which core does include) are unchanged.

Install / upgrade: upload zc_plugins/PreviewEmail/v3.0.1/ and it upgrades in place from 3.0.0 through Modules > Plugin Manager.

Reported by Scott C. Wilson.