model: Add ability to get pointer to Fib from fib::Entry
diff --git a/model/fib/ndn-fib-impl.h b/model/fib/ndn-fib-impl.h
index 57d7d50..3054420 100644
--- a/model/fib/ndn-fib-impl.h
+++ b/model/fib/ndn-fib-impl.h
@@ -40,8 +40,8 @@
     ndnSIM::counting_policy_traits
     > trie;
 
-  EntryImpl (const Ptr<const Name> &prefix)
-    : Entry (prefix)
+  EntryImpl (Ptr<Fib> fib, const Ptr<const Name> &prefix)
+    : Entry (fib, prefix)
     , item_ (0)
   {
   }