[Pkg-gmagick-im-team] Bug#870016: Memory-Leak in ReadMATImage()

[Bastien ROUCARIES]

Source: imagemagick
Version: 8:6.9.7.4+dfsg-13
Severity: important
Tags: security upstream
X-Debbugs-CC: team at security.debian.org
control: found -1 8:6.8.9.9-5+deb8u8
control: found -1 8:6.8.9.9-5+deb8u9
control: found -1 8:6.7.7.10-5+deb7u14
forwarded: https://github.com/ImageMagick/ImageMagick/issues/587

A specail crafted file create a memory leak in MTA file coder. The
code need to free two buffer
in some exceptionnal circonstance, instead than just one