Solved some compatibility errors

git-svn-id: https://plugins.svn.wordpress.org/microdata-about/trunk@1041858 b8457f37-d9ea-0310-8a92-e5e31aec5664
Solved some compatibility Errors

git-svn-id: https://plugins.svn.wordpress.org/microdata-about/trunk@1041859 b8457f37-d9ea-0310-8a92-e5e31aec5664