Semi-success with "fair" sharing without NACKs

There was a bug, causing empty queue on consumer nodes
diff --git a/model/pit/ndn-pit-entry.cc b/model/pit/ndn-pit-entry.cc
index af66570..0a06ed2 100644
--- a/model/pit/ndn-pit-entry.cc
+++ b/model/pit/ndn-pit-entry.cc
@@ -248,6 +248,13 @@
 }
 
 uint32_t
+Entry::GetOutgoingCount () const
+{
+  return m_outgoing.size ();
+}
+
+
+uint32_t
 Entry::GetMaxRetxCount () const
 {
   return m_maxRetxCount;