imagemagick - security update

The code did not check the integer didn’t overflow before trying to
resize a buffer. A specially crafted file could result in using memory
past the end of the allocated buffer.

This security CVEs for this issue (CVE-2016-4563) along with
CVE-2016-4562 and CVE-2016-4564 were based on a security advisory that
will not be made public. This security fix was generated based only on
the surface-level code-change information that is public in GitHub. For
more information on this, see: <http://seclists.org/oss-sec/2016/q2/476&gt;

For Debian 7 Wheezy, these problems have been fixed in version
8:6.7.7.10-5+deb7u7.

We recommend that you upgrade your imagemagick 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;