The issue is somewhat theoretical, since in reasonbale fonts the indices
should always be valid, and in fact are fairly likely to be 0. On the other
hand, web fonts exist.
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Aric Stewart <aric@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>