* Fixed warning if an gzip handler is already active

git-svn-id: https://plugins.svn.wordpress.org/google-sitemap-generator/trunk@885261 b8457f37-d9ea-0310-8a92-e5e31aec5664
* Added Portuguese translation

git-svn-id: https://plugins.svn.wordpress.org/google-sitemap-generator/trunk@885263 b8457f37-d9ea-0310-8a92-e5e31aec5664