Comment 3 for bug 1300277

So this isn't really a proper fix, but I think it's better than having the output names totally wrong.

A proper fix would be to store the actual output number somewhere so that we can index correctly into the full array. Alternatively, check for which outputs are connected when building the gui, instead of when building the cache. Or maybe even don't use the cache at all and always use the randr supplied data as-is.