Made a fix to the xml saving.

        # write something sensible.

        for waveform in self.waveforms:

            procrow = process.register_to_xmldoc(xmldoc, "minke_burst_mdc", {}) # waveform.params)

            try:

                waveform_row = waveform._row(sim)

            else:

                waveform_row = waveform

            waveform_row.process_id = procrow.process_id

            sim.append(waveform_row)

            #del waveform_row