hal scripts cannot do INT32

[Richard Hughes]

On Wed, Jun 10, 2009 at 4:52 PM, Matthew Garrett<mjg59 at srcf.ucam.org> wrote:
> We're still using hal for backlight control, and this is something that
> really should be fixed. It should be easy enough to replace the scripts.

I've deliberately not ported this to DeviceKit-power, as I assumed
most laptops should be using xrandr interfaces long term. If you think
it's needed, it's a trivial add to an interface in DKp.

Richard.