Suspension and hibernation not working under ConsoleKit2

I was trying xfce for the first time a few days ago and noticed that the suspension function wasn't working. I assumed something was happening between xfce and consolekit2 and after a bit of digging I found that this line was the problem. If it's changed to g_variant_new ("(b)", TRUE), suspend (and by extension, hibernation) will work again.

I've no idea why the current version doesn't work, it looks like it does the same thing.