[PATCH] Fix xrandr backlight brightness control on 64 bit Linux. The display brightness property is a 32 bit integer, using a long doesn't work on 64 bit build.

[Marcus Overhagen]

Hello Mike,

I considered putting patches into the bugtracker, but instead decided to
follow
http://wiki.xfce.org/dev/howto/contribute and posted them to this list as
xfce4-power-manager appears to be unmaintained for about two years.

All power-manager bug reports in bugzilla are assigned to Ali Abdallah,
the current maintainer. He made his last commit on 2011-02-16 and the
 last post to a mailing list on 2011-04-17.

Some patches for this problem are even rotting attached to bug report 8840
for more than a year already (I decided against using them, first one was
a workaround only, second was unnecessarily extensive).

regards
Marcus Overhagen
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