Fix player palette double-add bug

OpenRa.Game/Chrome.cs

@@ -356,6 +356,10 @@ namespace OpenRa
 			var d = left ? +1 : Player.PlayerColors.Count() - 1;
 
 			var newIndex = ((int)Game.world.LocalPlayer.PaletteIndex + d) % Player.PlayerColors.Count();
+
+			Game.IssueOrder(
+				Order.Chat("color count " + Player.PlayerColors.Count()));
+				
 			while (!PaletteAvailable(newIndex) && newIndex != (int)Game.world.LocalPlayer.PaletteIndex)
 				newIndex = (newIndex + d) % Player.PlayerColors.Count();
 

OpenRa.Game/Game.cs

@@ -65,7 +65,9 @@ namespace OpenRa
 			Timer.Time( "load rules: {0}" );
 
 			world = null;	// trying to access the old world will NRE, rather than silently doing it wrong.
+			Player.ResetPlayerColorList();
 			world = new World();
+						
 			Game.world.ActorAdded += a => 
 			{ 
 				if (a.Owner != null && a.Info.Traits.Contains<OwnedActorInfo>()) 

OpenRa.Game/Player.cs

@@ -30,8 +30,16 @@ namespace OpenRa
 		public World World { get { return PlayerActor.World; } }
 
 		public static List<Tuple<string, string, Color>> PlayerColors = new List<Tuple<string, string, Color>>();
+		public static void ResetPlayerColorList()
+		{
+			// This is unsafe if the mapchange introduces/removes mods that defines new colors
+			// TODO: ensure that each player's palette index is reassigned appropriately
+			PlayerColors = new List<Tuple<string, string, Color>>();
+		}
+		
 		public static void RegisterPlayerColor(string palette, string name, Color c)
 		{
+			Log.Write("Adding player color {0}",name);
 			PlayerColors.Add(new Tuple<string, string, Color>(palette, name, c));
 		}