fixed 404 PHP notice

git-svn-id: https://plugins.svn.wordpress.org/open-graph-protocol-framework/trunk@893787 b8457f37-d9ea-0310-8a92-e5e31aec5664
tagged 1.0.7

git-svn-id: https://plugins.svn.wordpress.org/open-graph-protocol-framework/trunk@893788 b8457f37-d9ea-0310-8a92-e5e31aec5664