From f2644668da403801a2b0dd2f13b2c4a164df12d8 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <doug.gregor@gmail.com>
Date: Fri, 14 May 2004 05:41:53 +0000
Subject: [PATCH] reverse_graph.hpp: Add null_vertex() to traits

[SVN r22818]
---
 libs/graph | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/graph b/libs/graph
index 20548378ed..89476c57dd 160000
--- a/libs/graph
+++ b/libs/graph
@@ -1 +1 @@
-Subproject commit 20548378ed8d268ad95cf1cba544503c97839243
+Subproject commit 89476c57ddb9c2eca8ec46073bded5f3f77f867d