xrandr: Fix showing of gamma values
After applying commit 6bf48ae8 'xrandr --current --verbose' shows multiplicative inverses for gamma. For example, after 'xrandr --output --gamma 0.5:0.5:0.5', the output of 'xrandr --current --verbose' will be "Gamma: 2.0:2.0:2.0" instead of expected "Gamma: 0.5:0.5:0.5".
Amends 6bf48ae8
Signed-off-by: Ilya Pominov ipominov@astralinux.ru