[Fontconfig] Patch: fix double free (spotted by Coverity)

[Frederic Crozat]

Hi,

I'm reviewing Coverity defect results on fontconfig
(http://scan.coverity.com/ ) to try to fix all defects for 2.3.95 (or at
least 2.4.0).

First patch fixes double free (and closing the same fd twice too).

I'll send other patches if needed while reviewing defects list.
-- 
Frederic Crozat <fcrozat at mandriva.com>
Mandriva
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