[Mono-list] Fix for Pango in GTK# - Missing Scale

[Daniel Morgan]

Currently, I am unable to find Scale in gtk# pango.
Here is what I came up with.  Is it okay?

namespace Pango {
	
	public sealed class Scale {
		public static readonly double PangoScale = 1024.0;

		public static readonly double XX_Small = 0.5787037037037;
		public static readonly double X_Small = 0.6444444444444;
		public static readonly double Small = 0.8333333333333;
		public static readonly double Medium = 1.0;
		public static readonly double Large = 1.2;
		public static readonly double X_Large = 1.4399999999999;
		public static readonly double XX_Large = 1.728;
	}
}