libxslt - security update

A heap overread bug was found in libxslt, which can cause arbitrary
code execution or denial of service.

For Debian 7 Wheezy, these problems have been fixed in version
1.1.26-14.1+deb7u2.

We recommend that you upgrade your libxslt 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;