* Fixed empty Archives and Authors in case there were no posts

git-svn-id: https://plugins.svn.wordpress.org/google-sitemap-generator/trunk@900247 b8457f37-d9ea-0310-8a92-e5e31aec5664
* Changed version information

git-svn-id: https://plugins.svn.wordpress.org/google-sitemap-generator/trunk@900249 b8457f37-d9ea-0310-8a92-e5e31aec5664
* Changed version information

git-svn-id: https://plugins.svn.wordpress.org/google-sitemap-generator/trunk@900250 b8457f37-d9ea-0310-8a92-e5e31aec5664