client: Add DnD cursors to the managed cursors list

That way we'll be able to set the corresponding pointer surface to
a current DnD operation.

Signed-off-by: Carlos Garnacho <carlosg@gnome.org>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
diff --git a/clients/window.h b/clients/window.h
index 1128d71..349dead 100644
--- a/clients/window.h
+++ b/clients/window.h
@@ -192,6 +192,9 @@
 	CURSOR_IBEAM,
 	CURSOR_HAND1,
 	CURSOR_WATCH,
+	CURSOR_DND_MOVE,
+	CURSOR_DND_COPY,
+	CURSOR_DND_FORBIDDEN,
 
 	CURSOR_BLANK
 };