fixed image size for open graph

git-svn-id: https://plugins.svn.wordpress.org/squirrly-seo/trunk@774048 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed image size for open graph

git-svn-id: https://plugins.svn.wordpress.org/squirrly-seo/trunk@774050 b8457f37-d9ea-0310-8a92-e5e31aec5664