Bug#691621: [xorg-server] [wheezy] failed transform resulting in 0,0 mouse pos (patch linked)

[Rob Lewis <rrl125@gmail.com>]

Package: xserver-xorg-core

Version: 2:1.12.4-1

Introduced in xorg-xserver 1.12.13, there was a bugfix to fix movements for tablets. This fix called out to a new function (transform_invert) which does not work correctly in some situations.

This results in Debian Wheezy not being usable in a VM due to sporadic mouse movements.,

XOrg maintainers have fixed this in master, but it has not been released yet. xorg-server is not usable for me in a VM as a guest.

http://cgit.freedesktop.org/xorg/xserver/commit/?id=3d1051aecbb1955084804133cacd12c7f696833a

Is it possible to get this patch into the 1.12.14 package? This affects 1.13.0 as well.