bug#46827: Broken initial size of GTK3 frame

[Eli Zaretskii]

> From: martin rudalics <rudalics@gmx.at>
> Date: Mon, 1 Mar 2021 09:31:20 +0100
> 
> It turns out that the "something else" is just that
> 
>               /* Querying further backends can be very slow, so we only do
>                  it if the user has explicitly requested it (Bug#43177).  */
>               if (query_all_font_backends == false)
>                 break;
> 
> The attached patch reverting 58430f29968a5661caff630d20dbbe7c864fe08d
> and removing the entity above fixes the bug on master.

Thanks, but removing the zero_vector entity is a non-starter.  We paid
dearly for that change, so I don't want to get that problem back
again.

The other change is also quite important.

We need to find a better way of fixing this problem.