removed $key assignment casting to integer

git-svn-id: https://plugins.svn.wordpress.org/export-user-data/trunk@906486 b8457f37-d9ea-0310-8a92-e5e31aec5664
removed $key assignment casting to integer

git-svn-id: https://plugins.svn.wordpress.org/export-user-data/trunk@906488 b8457f37-d9ea-0310-8a92-e5e31aec5664