Correct the following error when building against dmusic.
.../wine/windows/dmusici.h:370:14: error: use of enum ‘enumDMUS_STYLET_TYPES’ without previous declaration
Signed-off-by: Alistair Leslie-Hughes <leslie_alistair@hotmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>