Wizard network fails if no interface in conf.json

I manually edited the conf.json to remove the network interfaces entries.

Then when launching the wizard to set them again I get this error :

$ duniter wizard network
2018-10-22T18:00:38+02:00 - debug: Plugging file system...
2018-10-22T18:00:38+02:00 - debug: Loading conf...
2018-10-22T18:00:39+02:00 - error: Error: No interface to listen to.
    at onLoading (/opt/duniter/app/modules/bma/index.js:157:31)
    at FileDAL.server.dal.loadConfHook (/opt/duniter/index.js:286:31)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:160:7