amazon s3 hook fix

git-svn-id: https://plugins.svn.wordpress.org/ewww-image-optimizer-cloud/trunk@995847 b8457f37-d9ea-0310-8a92-e5e31aec5664
releasing 2.0.2

git-svn-id: https://plugins.svn.wordpress.org/ewww-image-optimizer-cloud/trunk@995849 b8457f37-d9ea-0310-8a92-e5e31aec5664