[Galene] Re: Background blur on Safari

[Juliusz Chroboczek <jch@irif.fr>]

>> - None of which means anything to me!
> 
> This looks like just the normal log from MediaPipe.  Grr.  I'll see if
> there's anywhere I'm not logging an error properly.

I've added better error handling to the code, checked that it works well
under Chromium, and I've had a user with Safari report that there's an
error during initialisation.

Unfortunately, Safari doesn't want to show me the error.  The error I'm
getting instead would seem to indicate that errors are not serialisable
under Safari.  (If that's the case, then Safari would be violating
Section 2.7.3 paragraph 17 of the spec.)

I'm giving up for now.  I've disabled background blur under Safari, and
might work on it again when I can borrow a Mac for a few hours.

-- Juliusz