[HarfBuzz] Wrong GDEF class in timesi.ttf on Win7

[Jonathan Kew]

On 24/2/16 16:41, Behdad Esfahbod wrote:
> Thanks Jonathan.  Somehow that Mozilla bug escaped my attention for five
> years!
>
> I'll add code to reject GDEF table based on its length and glyph class
> of doublequote.  Do you have any more blacklisted tables like that in
> Firefox?
>

See https://bugzilla.mozilla.org/show_bug.cgi?id=721719 for discussion 
of bad tables in certain versions of Lohit Devanagari (GDEF) and Roboto 
(GSUB).

That's all I can think of offhand... I'm sure there are plenty more 
broken fonts out there, but we don't usually add font-specific 
workarounds unless the user experience is really bad.

JK