change compatibility version

git-svn-id: https://plugins.svn.wordpress.org/photo-gallery/trunk@1051322 b8457f37-d9ea-0310-8a92-e5e31aec5664
change compatibility version

git-svn-id: https://plugins.svn.wordpress.org/photo-gallery/trunk@1051323 b8457f37-d9ea-0310-8a92-e5e31aec5664