Fix bug that incorrectly initializes the number of copies of a messag…

…e upon generation

src/mobemu/node/Message.java

@@ -46,7 +46,7 @@ public Message(int source, int destination, String message, long timestamp, int
         this.message = message;
         this.timestamp = timestamp;
         this.tags = new Context();
-        this.stats = new MessageStats(copies, id);
+        this.stats = new MessageStats(copies, source);
     }
 
     /**