remove ROBUST, this is taken care of by NDEBUG (thanks to Petr Uzel)

connection.cpp

@@ -64,8 +64,7 @@ u_int32_t PackList::sumanddel (timeval t)
 /* packet may be deleted by caller */
 Connection::Connection (Packet * packet)
 {
-	if (!ROBUST)
-		assert (packet != NULL);
+	assert (packet != NULL);
 	connections = new ConnList (this, connections);
 	sent_packets = new PackList ();
 	recv_packets = new PackList ();