table: pit::FaceRecord stores Face& instead of shared_ptr

refs #3164

Change-Id: Ib23ab2341a37213fee791f2070f13b76da851d53

daemon/table/pit-face-record.cpp

@@ -1,12 +1,12 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2014,  Regents of the University of California,
- *                      Arizona Board of Regents,
- *                      Colorado State University,
- *                      University Pierre & Marie Curie, Sorbonne University,
- *                      Washington University in St. Louis,
- *                      Beijing Institute of Technology,
- *                      The University of Memphis
+ * Copyright (c) 2014-2016,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
  *
  * This file is part of NFD (Named Data Networking Forwarding Daemon).
  * See AUTHORS.md for complete list of NFD authors and contributors.
@@ -28,7 +28,7 @@
 namespace nfd {
 namespace pit {
 
-FaceRecord::FaceRecord(shared_ptr<Face> face)
+FaceRecord::FaceRecord(Face& face)
   : m_face(face)
   , m_lastNonce(0)
   , m_lastRenewed(time::steady_clock::TimePoint::min())