Do not check whether internal X screensaver is enabled or disabled, since we have disabled it ourselves. Some apps might try to disable it too to prevent screensavers, but then our logic breaks[*]. Those apps need to disable DPMS anyway, or they will still have problems, so the DPMS code above should be enough.

Besides, I doubt other screensaver implementations check this either.

OOo presentation mode still works because of the previous fix.