timed-wait for fetcher in hope to solve crash problem

Change-Id: I43d975c79deae25ab193fa484127b246e917724f
diff --git a/src/fetch-manager.h b/src/fetch-manager.h
index 31cb063..25ccac0 100644
--- a/src/fetch-manager.h
+++ b/src/fetch-manager.h
@@ -85,6 +85,9 @@
   void
   ScheduleFetches ();
 
+  void
+  TimedWait (Fetcher &fetcher);
+
 private:
   Ccnx::CcnxWrapperPtr m_ccnx;
   Mapping m_mapping;