tools/libxenguest: handle more than 16T in precopy_stats

total_written tracks the number of transferred dirty pages.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Wei Liu <wl@xen.org>

tools/include/xenguest.h

@@ -438,7 +438,7 @@ struct xenevtchn_handle;
 struct precopy_stats
 {
     unsigned int iteration;
-    unsigned int total_written;
+    unsigned long total_written;
     long dirty_count; /* -1 if unknown */
 };