Removed #include of wingdi.h and windef.h from winuser.h (and resolved
the resulting compilation failures).

diff --git a/dlls/msacm32/internal.c b/dlls/msacm32/internal.c
index c179f3b..c1db520 100644
--- a/dlls/msacm32/internal.c
+++ b/dlls/msacm32/internal.c
@@ -10,6 +10,8 @@
 #include <string.h>
 
 #include "winbase.h"
+#include "windef.h"
+#include "wingdi.h"
 #include "winuser.h"
 #include "winerror.h"
 #include "driver.h"