publisher: fix encoding bug in routing table publisher

refs: #4453

Change-Id: I03e819e963f0957f3d40ff25e378f2b9b17357b7
diff --git a/src/tlv/destination.cpp b/src/tlv/destination.cpp
index 6f9f918..a1ea06f 100644
--- a/src/tlv/destination.cpp
+++ b/src/tlv/destination.cpp
@@ -54,13 +54,7 @@
   return totalLength;
 }
 
-NDN_CXX_DECLARE_WIRE_ENCODE_INSTANTIATIONS(Destination);
-
-template size_t
-Destination::wireEncode<ndn::encoding::EncoderTag>(ndn::EncodingImpl<ndn::encoding::EncoderTag>& block) const;
-
-template size_t
-Destination::wireEncode<ndn::encoding::EstimatorTag>(ndn::EncodingImpl<ndn::encoding::EstimatorTag>& block) const;
+NDN_CXX_DEFINE_WIRE_ENCODE_INSTANTIATIONS(Destination);
 
 const ndn::Block&
 Destination::wireEncode() const