added PaletteType enum

OpenRa.Game/Graphics/PaletteType.cs

@@ -0,0 +1,10 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game.Graphics
+{
+	//Note: should match the ordering in HardwarePalette.cs
+	enum PaletteType { Gold, Blue, Red, Orange, Teal, Salmon, Green, Gray, Shadow, Invuln, Chrome };
+}