[Fontconfig] Patch: fix null pointer access and missing assignment (spotted by Coverity)

[Frederic Crozat]

The following patch fixes two Coverity defects (#767 and #1195) in
fcfreetype.c.

One is cristal clear (access to pointer before NULL test), the other
part might be wrong : error was probably not assigned anymore in the
code (so testing its value was useless after line 2782), so I assumed
error retrieval was missing.
-- 
Frederic Crozat <fcrozat at mandriva.com>
Mandriva
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