Removed the $wpdb->prepare statement round a piece of SQL that the WP 3.9.1 guys have helpfully turned into an error when they didn't need to by checking for the instance of % inside the SQL string! Should hopefully help people using WP 3.9+ not have bugs any more.

git-svn-id: https://plugins.svn.wordpress.org/strictly-tweetbot/trunk@918677 b8457f37-d9ea-0310-8a92-e5e31aec5664