Reduced gamma settings (e.g. "0.8", as per the man page) also apply for day time instead of just for the night time

[Ð.Sp!dér]

Steps to reproduce:

1. Open ~/.config/redshift.conf.
2. Set the "gamma" option to, say, "0.8", as indicated in the example from the man page.
3. Start 'redshift-gtk' during the day.

Note that the gamma settings are applied immediately, even during day time.
The expected behaviour is for the gamma adjustment to kick in only during night time.

Additional information:

Redshift version: 1.8-1
Operating System: Arch Linux i686, up to date.
Kernel: linux-lts, version 3.10.25-1
Video Driver: xf86-video-nouveau, version: 1.0.10-1