fw+table: use Interest::Nonce instead of uint32_t

Change-Id: I2a4b83696db80d2d0b675121da53a73c309e059c
diff --git a/daemon/table/pit-face-record.hpp b/daemon/table/pit-face-record.hpp
index 7c36ab6..1a68a51 100644
--- a/daemon/table/pit-face-record.hpp
+++ b/daemon/table/pit-face-record.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2019,  Regents of the University of California,
+ * Copyright (c) 2014-2020,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -51,7 +51,7 @@
     return m_face;
   }
 
-  uint32_t
+  Interest::Nonce
   getLastNonce() const
   {
     return m_lastNonce;
@@ -79,7 +79,7 @@
 
 private:
   Face& m_face;
-  uint32_t m_lastNonce = 0;
+  Interest::Nonce m_lastNonce{0, 0, 0, 0};
   time::steady_clock::TimePoint m_lastRenewed = time::steady_clock::TimePoint::min();
   time::steady_clock::TimePoint m_expiry = time::steady_clock::TimePoint::min();
 };