Iterators never use element_proxy only references

typedef pointer is not part of the Vector Expression Concept
and not needed for implementation


[SVN r24850]

libs/numeric/ublas

@@ -1 +1 @@
-Subproject commit 7bd50935f5e74d6b9fb4a60c6ef7c98ec3b3fe7d
+Subproject commit 79911e151aa32428dcee898c74221473cbfccbfb