Bug in Smart Crawl

We found a bug when configuring the Sitemap settings in the SmartCrawl plugin.

When all taxonomies are excluded via the settings, the _load_taxonomies_items makes a call to get_terms with an empty query and loads all terms instead. By adding if(empty($tax))
return false;
above the get_terms call, we were able to avoid it and see the correct output in the Sitemap.