boost/ref.hpp: - Added get_pointer method to return a pointer (instead of a reference)

libs/bind/ref.html:
  - Document get_pointer

[SVN r13322]

include/boost/ref.hpp

@@ -36,6 +36,8 @@ public:
 
     T& get() const { return *t_; }
 
+    T* get_pointer() const { return t_; }
+
 private:
 
     T* t_;