util: Support MustBeFresh processing in InMemoryStorage

Change-Id: I8e8e647d7673e4e0fe8dd1c5025fbc8e5e524c70
Refs: #3274
diff --git a/src/util/in-memory-storage-lru.cpp b/src/util/in-memory-storage-lru.cpp
index b823b2b..2a50644 100644
--- a/src/util/in-memory-storage-lru.cpp
+++ b/src/util/in-memory-storage-lru.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2014 Regents of the University of California.
+ * Copyright (c) 2013-2016 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -29,6 +29,12 @@
 {
 }
 
+InMemoryStorageLru::InMemoryStorageLru(boost::asio::io_service& ioService,
+                                       size_t limit)
+  : InMemoryStorage(ioService, limit)
+{
+}
+
 InMemoryStorageLru::~InMemoryStorageLru()
 {
 }