pixman: Changes to 'debian-wheezy'

[Julien Cristau <jcristau@moszumanska.debian.org>]

New branch 'debian-wheezy' available with the following commits:
commit 0f3ac9b455d7a94c28664e96f79126131a398a69
Author: Julien Cristau <jcristau@debian.org>
Date:   Mon Dec 16 17:20:17 2013 +0100

    Upload to wheezy-security

commit 6d126f917b9b3b9a86871939f78f17a92038f70e
Author: Ritesh Khadgaray <khadgaray@gmail.com>
Date:   Wed Oct 23 17:29:07 2013 -0400

    pixman_trapezoid_valid(): Fix underflow when bottom is close to MIN_INT
    
    If t->bottom is close to MIN_INT (probably invalid value), subtracting
    top can lead to underflow which causes crashes.  Attached patch will
    fix the issue.
    
    This fixes bug 67484.
    
    (cherry picked from commit 5e14da97f16e421d084a9e735be21b1025150f0c)