publisher: fix encoding bug in routing table publisher

refs: #4453

Change-Id: I03e819e963f0957f3d40ff25e378f2b9b17357b7
diff --git a/src/tlv/destination.hpp b/src/tlv/destination.hpp
index 7c577e8..859c8a8 100644
--- a/src/tlv/destination.hpp
+++ b/src/tlv/destination.hpp
@@ -91,6 +91,8 @@
   mutable ndn::Block m_wire;
 };
 
+NDN_CXX_DECLARE_WIRE_ENCODE_INSTANTIATIONS(Destination);
+
 std::ostream&
 operator<<(std::ostream& os, const Destination& destination);