Approximant is None

When running pesummary on the bilby basic_tutorial output (i.e. running this script which generates this h5 file, I seem to get a few errors related to the fact that the 'approximant' is None.

As far as I'm aware, the waveform approximant isn't cleanly passed through to the result in bilby yet. This seems to be crucial to how pesummary is setup. Is that correct? If so I'll work on getting it passed through in a sensible manner.