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

windows/timer.c

diff --git a/windows/timer.c b/windows/timer.c
index b46be52..b724780 100644
--- a/windows/timer.c
+++ b/windows/timer.c
@@ -4,6 +4,8 @@
  * Copyright 1993 Alexandre Julliard
  */
 
+#include "windef.h"
+#include "wingdi.h"
 #include "wine/winuser16.h"
 #include "winuser.h"
 #include "queue.h"