Some c++ tricks. Not finished

diff --git a/model/ndn_namebuilder.cc b/model/ndn_namebuilder.cc
index 8f65647..e907e01 100644
--- a/model/ndn_namebuilder.cc
+++ b/model/ndn_namebuilder.cc
@@ -57,5 +57,10 @@
   return *this;
 }
 
+NameBuilder::operator const unsigned char* ()
+{
+  return m_value->buf;
+}
+  
 }
 }