xorg-x11-server: fixed an overflow in trapezoid handling

The X server was updated to fix a possible X server crash using invalid trapezoids.
(bnc#853846 CVE-2013-6424)

Fixed bugs
bnc#853846
VUL-0: CVE-2013-6424: xorg-x11-server: integer underflow when handling trapezoids
Selected Binaries
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