Temporary fix for the MS_Windows build

* nt/inc/ms-w32.h (WIN32_LEAN_AND_MEAN): Define to an empty value,
to be consistent with Gnulib's utimens.c.  This is because utimens.c
unconditionally defines WIN32_LEAN_AND_MEAN to an empty value, so the
previous definition here conflicted with that.

nt/inc/ms-w32.h

@@ -151,7 +151,7 @@ extern char *getenv ();
 #endif
 
 /* Make a leaner executable.  */
-#define WIN32_LEAN_AND_MEAN 1
+#define WIN32_LEAN_AND_MEAN
 
 #include <sys/types.h>