fix Clang/WinSDK warnings

src/win/win.c

@@ -32,6 +32,7 @@
 #include <stdlib.h>
 #include <time.h>
 #include <wchar.h>
+#include <io.h>
 #define HAVE_STDARG_H
 #include <86box/86box.h>
 #include <86box/config.h>

src/win/win_dialog.c

@@ -35,7 +35,7 @@
 
 
 
-#define STRING_OR_RESOURCE(s) ((!(s)) ? (NULL) : ((((uintptr_t)s) < ((uintptr_t)65636)) ? (MAKEINTRESOURCE(s)) : (s)))
+#define STRING_OR_RESOURCE(s) ((!(s)) ? (NULL) : ((((uintptr_t)s) < ((uintptr_t)65636)) ? (MAKEINTRESOURCE((uintptr_t)s)) : (s)))
 
 
 WCHAR	wopenfilestring[512];