fixed very strange VC++ bug that was showing up in graph/test/graph.cpp

Something about the code gen for compressed_pair_1::operator=
was going wrong. Writing it explicitly, and playing with some ordering
fixed the problem, don't ask my why.


[SVN r8765]

libs/utility

@@ -1 +1 @@
-Subproject commit 6caf7d4d5a5ca8d720bd36be495335b4b3b0b1d9
+Subproject commit e5c81d07022e9e0d8e3a789cd0322303bd14f27a