Renamed wintypes.h to windef.h.

diff --git a/misc/w32sys.c b/misc/w32sys.c
index 0220d2e..43e6386 100644
--- a/misc/w32sys.c
+++ b/misc/w32sys.c
@@ -5,7 +5,7 @@
  * Copyright (c) 1996 Anand Kumria
  */
 
-#include "wintypes.h"
+#include "windef.h"
 #include "w32sys.h"
 
 /***********************************************************************