bug#51155: 29.0.50; Incorrect weight used in Cantarell VF

[Eli Zaretskii]

> From: Utkarsh Singh <utkarsh190601@gmail.com>
> Cc: 51155@debbugs.gnu.org
> Date: Wed, 13 Oct 2021 21:05:05 +0530
> 
> >> What are the numerical values of weight in these fonts?
> >
> > Can you please tell me how I can get this info?
> 
> Weight table:
> 
> | Face       | Weight |
> |------------+--------|
> | Extra bold |    205 |
> | Bold       |    200 |
> | Regular    |     80 |
> | Light      |     50 |

I think that's the problem: Emacs thinks that Regular should have the
weight of 100, see font.c.