Some c++ tricks. Not finished

diff --git a/model/ndn_namebuilder.h b/model/ndn_namebuilder.h
index 1b54bfe..1198471 100644
--- a/model/ndn_namebuilder.h
+++ b/model/ndn_namebuilder.h
@@ -37,6 +37,8 @@
   
   const ccn_charbuf* GetName () const;
   NameBuilder& operator () (const std::string &s);
+
+  operator const unsigned char* ();
 private:
   ccn_charbuf *m_value;
 };