fixed bug in remove_edge(e, g) for bidirectional graphs.

The problem was that the edge property was not removed from the edge list


[SVN r23288]

libs/graph

@@ -1 +1 @@
-Subproject commit 4c469946fe0cba6d4a2c6197ae2fa463626774c3
+Subproject commit 00a2844d669817db72a2e95cf851adf62557ebaf