This fixes type format string generation for the following IDL:

typedef int *intp;
[pointer_default(ref)] interface IRef {
    void a(intp *a);
}
[pointer_default(unique)] interface IUnique {
    void b(intp *a);
}
Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>