fontconfig - security update

A possible double free vulnerability was found in fontconfig. The
problem was due to insufficient validation when parsing the cache
file.

For Debian 7 Wheezy, these problems have been fixed in version
2.9.0-7.1+deb7u1.

We recommend that you upgrade your fontconfig packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <https://wiki.debian.org/LTS&gt;