Take adavantage of improved iterator_traits to do more tests on MSVC. Hack

around an MSVC-with-STLport internal compiler error.


[SVN r9280]

libs/utility

@@ -1 +1 @@
-Subproject commit 3cb6420eda885d8f7c987b02b56a7ee5238808d0
+Subproject commit 56f5f6e8d566f265d136556999f1e64f8e21c579