reverse_graph.hpp: Add null_vertex() to traits

[SVN r22818]
This commit is contained in:
Douglas Gregor 2004-05-14 05:41:53 +00:00
parent 8cbe0c48ec
commit f2644668da

@ -1 +1 @@
Subproject commit 20548378ed8d268ad95cf1cba544503c97839243
Subproject commit 89476c57ddb9c2eca8ec46073bded5f3f77f867d