Fixed a bug that caused a PHP fatal error in Linux/Unix servers.

git-svn-id: https://plugins.svn.wordpress.org/fetch-tweets-hashtag-cloud/trunk@903961 b8457f37-d9ea-0310-8a92-e5e31aec5664
- Marked 1.0.2.1 as stable.
- Updated the tested-up-to version.

git-svn-id: https://plugins.svn.wordpress.org/fetch-tweets-hashtag-cloud/trunk@903965 b8457f37-d9ea-0310-8a92-e5e31aec5664