Add some very basic backslash replacement when attempting to decode user data in…

… a UserSearch instance. refs #1576

@@ -180,6 +180,7 @@ class UserSearch implements ArrayAccess, Iterator, Countable {
         }
 
         list($user_id, $user_string) = mysql_fetch_row($this->result);
+        $user_string = str_ireplace("\\'", "\\\\'", $user_string);
         $json_data = json_decode($user_string, true);
         if (json_last_error() != JSON_ERROR_NONE) {
             return false;