encoding: move MAX_NDN_PACKET_SIZE constant

refs #2099

Change-Id: Ia52e32084ee7382c55d6ccc7ce71812c1854ba7f
diff --git a/src/face.cpp b/src/face.cpp
index 66e61bf..cf2d1e4 100644
--- a/src/face.cpp
+++ b/src/face.cpp
@@ -24,8 +24,8 @@
 #include "face.hpp"
 #include "detail/face-impl.hpp"
 
+#include "encoding/tlv.hpp"
 #include "security/key-chain.hpp"
-
 #include "util/time.hpp"
 #include "util/random.hpp"