Fix vulnerability in handling _session argument of utils/save-prefs (#1489382)

Aleksander Machniak

2013-10-17 037af6890fe6fdb84a08d3c86083e847c90ec0ad

 program/lib/Roundcube/rcube.php

@@ -1295,6 +1295,7 @@
            return $_SESSION['language'];
        }
    }

}