tiff and CVE-2016-10095

[Guido Günther]

Hi Moritz,
I'm trying to figure out the reasoning for @51764. This marks tiff as
affected by CVE-2016-10095. However from the upstream bug and the
changes we made in wheezy it looks like the changes we made already are
sufficient to fix the issue. Do you have a hint why you think this is
not the case?
Cheers,
 -- Guido