BGL sample code error -- edge_property.cpp

edge_proprety.cpp, as included in Boost release 1.30.0, generates warnings under gcc 3.2.2, since it is missing a couple of typenames. Here's the needed patch: 95c95 < property_map::const_type ---

typename property_map::const_type 97c97 < property_map::const_type

typename property_map::const_type

- Chuck Messenger