woothemes/woocommerce — pull request #4933 by growdev (2014-02-24 18:03:55+00:00)
Title: Allow empty categories to show

Currently when the 'hide_empty' argument for get_categories() is filtered to '0' categories with no products are returned from the query, but this line ignores this.
https://github.com/woothemes/woocommerce/blob/master/includes/wc-template-functions.php#L1423