Moved all Win16 definitions out of the standard Windows headers.

diff --git a/msdos/dosaspi.c b/msdos/dosaspi.c
index 13f5a99..acd61e6 100644
--- a/msdos/dosaspi.c
+++ b/msdos/dosaspi.c
@@ -1,8 +1,8 @@
 #include "config.h"
 
 #include "winbase.h"
-#include "winaspi.h"
-#include "wnaspi32.h"
+#include "wine/windef16.h"
+#include "wine/winaspi.h"
 #include "heap.h"
 #include "debugtools.h"
 #include "selectors.h"