[Fontconfig] 2.3.91 performance regression from 2.3.2

[plam at MIT.EDU (Patrick Lam)]

Ronny V. Vindenes wrote:
> While testing 2.3.91 I noticed a huge performance regression compared to
> 2.3.2 (Fedora rawhide).

I've committed something which should fix your problem.  Let me know if
it works.

pat