Unordered: Implement C++0x equality.

[SVN r71354]

include/boost/unordered/detail/unique.hpp

@@ -57,9 +57,7 @@ namespace boost { namespace unordered { namespace detail {
                 n1; n1 = n1->next_)
             {
                 node_ptr n2 = other.find_matching_node(n1);
-                if(!BOOST_UNORDERED_BORLAND_BOOL(n2)) return false;
-                if(!extractor::compare_mapped(
-                    node::get_value(n1), node::get_value(n2)))
+                if(!n2 || node::get_value(n1) != node::get_value(n2))
                     return false;
             }