Patches for MWCW and gcc-4.0.

[SVN r26704]

include/boost/regex/mfc.hpp

@@ -164,6 +164,11 @@ public:
       out->AppendChar(v); 
       return *this; 
    }
+   typedef std::ptrdiff_t difference_type;
+   typedef B value_type;
+   typedef value_type* pointer;
+   typedef value_type& reference;
+   typedef std::output_iterator_tag iterator_category;
 };
 
 }