is_shop fatal error fixed

git-svn-id: https://plugins.svn.wordpress.org/woo-popup/trunk@937893 b8457f37-d9ea-0310-8a92-e5e31aec5664
is_shop fatal error fixed release tag added

git-svn-id: https://plugins.svn.wordpress.org/woo-popup/trunk@937902 b8457f37-d9ea-0310-8a92-e5e31aec5664