blank page bugfix

git-svn-id: https://plugins.svn.wordpress.org/wp-flexible-map-options/trunk@903088 b8457f37-d9ea-0310-8a92-e5e31aec5664
it is working with 3.9

git-svn-id: https://plugins.svn.wordpress.org/wp-flexible-map-options/trunk@903089 b8457f37-d9ea-0310-8a92-e5e31aec5664