include: Disallow using unicode.h when building against msvcrt.

Signed-off-by: Alexandre Julliard <julliard@winehq.org>

include/wine/unicode.h

@@ -31,6 +31,10 @@
 #error This file should not be used in Wine tests
 #endif
 
+#ifdef __WINE_USE_MSVCRT
+#error This file should not be used with msvcrt headers
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif

programs/xcopy/xcopy.c

@@ -46,7 +46,6 @@
 #include <stdlib.h>
 #include <windows.h>
 #include <wine/debug.h>
-#include <wine/unicode.h>
 #include "xcopy.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(xcopy);