gdk-pixbuf - security update

It was discovered that the original fix for CVE-2015-7552 (DLA-450-1)
was incomplete.

A heap-based buffer overflow in gdk-pixbuf, a library for image
loading and saving facilities, fast scaling and compositing of
pixbufs, allows remote attackers to cause a denial of service or
possibly execute arbitrary code via a crafted BMP file.

For Debian 7 Wheezy, these problems have been fixed in version
2.26.1-1+deb7u5.

We recommend that you upgrade your gdk-pixbuf 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;