Use #define WL_HIDE_DEPRECATED to avoid deprecated warnings for wl_buffer
diff --git a/clients/nested.c b/clients/nested.c
index a4e07f7..dfeeb96 100644
--- a/clients/nested.c
+++ b/clients/nested.c
@@ -40,6 +40,7 @@
 #include <cairo-gl.h>
 
 #include <wayland-client.h>
+#define WL_HIDE_DEPRECATED
 #include <wayland-server.h>
 
 #include "window.h"