update for tiff
- fixing multiple integer overflows:
* CVE-2012-2113 [bnc#767852]
* CVE-2012-2088 [bnc#767854]
- Submitted by Petr Gajdos (pgajdos)
Fixed bugs
bnc#767854
CVE-2012-2088: libtiff: type conversion flaw
bnc#767852
CVE-2012-2113: libtiff: integer overflow leading to heap-based buffer overflow when parsing crafted tiff files