libass - security update

Several vulnerabilities were discovered in libass, a library for
manipulating the SubStation Alpha (SSA) subtitle file format. The Common
Vulnerabilities and Exposures project identifies the following issues.

• CVE-2016-7969
  Mode 0/3 line wrapping equalization in specific cases which could
  result in illegal reads while laying out and shaping text.
• CVE-2016-7972
  Memory reallocation issue in the shaper which lead to undefined
  behavior

For Debian 7 Wheezy, these problems have been fixed in version
0.10.0-3+deb7u1.

We recommend that you upgrade your libass 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;