Add a lint check for trait placement on hardcoded actor names.

OpenRA.Mods.D2k/Traits/World/BuildableTerrainLayer.cs

@@ -18,6 +18,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.D2k.Traits
 {
 	[Desc("Attach this to the world actor. Required for LaysTerrain to work.")]
+	[TraitLocation(SystemActors.World)]
 	public class BuildableTerrainLayerInfo : TraitInfo, Requires<ITiledTerrainRendererInfo>
 	{
 		[Desc("Palette to render the layer sprites in.")]

OpenRA.Mods.D2k/Traits/World/D2kResourceRenderer.cs

@@ -14,10 +14,12 @@ using System.Collections.Generic;
 using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
 
 namespace OpenRA.Mods.D2k.Traits
 {
 	[Desc("Used to render spice with round borders.", "Attach this to the world actor")]
+	[TraitLocation(SystemActors.World | SystemActors.EditorWorld)]
 	public class D2kResourceRendererInfo : ResourceRendererInfo
 	{
 		public override object Create(ActorInitializer init) { return new D2kResourceRenderer(init.Self, this); }