Fixed a Possible SQL injection vulnerability reported by [Oskar Adin](https://github.com/osadi) and fixed by [Danny van Kooten](https://twitter.com/DannyvanKooten).

git-svn-id: https://plugins.svn.wordpress.org/i-recommend-this/trunk@996218 b8457f37-d9ea-0310-8a92-e5e31aec5664