minor code tweaks

git-svn-id: https://plugins.svn.wordpress.org/woocommerce-smart-collection/trunk@882872 b8457f37-d9ea-0310-8a92-e5e31aec5664
minor code tweaks

git-svn-id: https://plugins.svn.wordpress.org/woocommerce-smart-collection/trunk@882874 b8457f37-d9ea-0310-8a92-e5e31aec5664