libxtst - security update

Tobias Stoeckmann from the OpenBSD project discovered the following
vulnerability in libXtst, the X Record extension:

Insufficient validation of data from the X server
can cause out of boundary memory access or
endless loops (Denial of Service).

For Debian 7 Wheezy, these problems have been fixed in version
2:1.2.1-1+deb7u2.

We recommend that you upgrade your libxtst 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;