More minor cleanup

    /// Returns a reference to the element at the given index in the

    /// stack or `None` if the index is out of bounds

    pub fn get(&self, idx: usize) -> Option<&Ref<T>> {

        unsafe {

            if idx >= self.len() {

                return None;

            }

        unsafe {

            let r = Ref::from_ptr(self._get(idx));

            Some(r)

            Some(Ref::from_ptr(self._get(idx)))

        }

    }

    /// Returns a mutable reference to the element at the given index in the

    /// stack or `None` if the index is out of bounds

    pub fn get_mut(&mut self, idx: usize) -> Option<&mut Ref<T>> {

        unsafe {

            if idx >= self.len() {

                return None;

            }

        unsafe {

            Some(Ref::from_ptr_mut(self._get(idx)))

        }

    }

    unsafe fn _get(&self, idx: usize) -> *mut T::CType {

        assert!(idx <= c_int::max_value() as usize);

        OPENSSL_sk_value(self.as_stack(), idx as c_int) as *mut _

    }

}