Final brightness fix by Anryl

Found here: https://github.com/ryrzy/shooter_u_ics_kernel_3.0.xx/commit/142b3ccaf737b3cff841199285d710ea9dbc5537

Overlooked this commit at first, but it makes the brightness even lower. I tested it and now it -really- is as low as it should have been from the beginning. Max. brightness seems to be the same as before.
Small bug though: Brightness-slider behaves normal from "lowest" to "one-step-before-highest", but on "highest" it's actually a little bit darker than "one-step-before-highest".