chunks: fix impossible RTT values

Change-Id: Ia7386c6186362be5c50ea291a949fd40ec0224b4
Refs: #4604
diff --git a/tools/chunks/catchunks/pipeline-interests.hpp b/tools/chunks/catchunks/pipeline-interests.hpp
index 30ff2a0..20fec04 100644
--- a/tools/chunks/catchunks/pipeline-interests.hpp
+++ b/tools/chunks/catchunks/pipeline-interests.hpp
@@ -94,6 +94,13 @@
   }
 
   /**
+   * @brief check if the transfer is complete
+   * @return true if all segments have been received, false otherwise
+   */
+  bool
+  allSegmentsReceived() const;
+
+  /**
    * @return next segment number to retrieve
    * @post m_nextSegmentNo == return-value + 1
    */