Bug#856448: gdk-pixbuf: CVE-2017-6314: Infinite loop in io-tiff.c with large size

[Salvatore Bonaccorso]

Control: tags -1 + fixed-upstream patch

Fixed upstream via:

https://git.gnome.org/browse/gdk-pixbuf/commit/?id=1e513abdb55529f888233d3c96b27352d83aad5f

Regards,
Salvatore