Added missing timestamp to topic listener

Tools/generate_listener.py

@@ -173,6 +173,7 @@ for index,m in enumerate(messages[1:]):
 	print("\t\t\ti++;")
 	print("\t\t\tprintf(\"\\nTOPIC: %s #%%d\\n\", i);" % m)
 	print("\t\t\torb_copy(ID,sub,&container);")
+	print("\t\t\tprintf(\"timestamp: %\" PRIu64 \"\\n\", container.timestamp);")
 	for item in message_elements[index+1]:
 		if item[0] == "float":
 			print("\t\t\tprintf(\"%s: %%8.4f\\n\",(double)container.%s);" % (item[1], item[1]))