Fix husks not updating targetable positions on teleport

This should have checked for IPositionableInfo to begin with.

Husk already implements IPositionable, so implementing *Info as well
makes sense, even if it only serves to exclude it from
ITargetablePositions caching for now.

OpenRA.Game/Actor.cs

@@ -124,9 +124,9 @@ namespace OpenRA
 			world.AddFrameEndTask(w =>
 			{
 				// Caching this in a AddFrameEndTask, because trait construction order might cause problems if done directly at creation time.
-				// All actors that can move should have IMove, if not it's pretty safe to assume the actor is immobile and
+				// All actors that can move or teleport should have IPositionable, if not it's pretty safe to assume the actor is completely immobile and
 				// all targetable positions can be cached if all ITargetablePositions have no conditional requirements.
-				if (!Info.HasTraitInfo<IMoveInfo>() && targetablePositions.Any() && targetablePositions.All(tp => tp.AlwaysEnabled))
+				if (!Info.HasTraitInfo<IPositionableInfo>() && targetablePositions.Any() && targetablePositions.All(tp => tp.AlwaysEnabled))
 					staticTargetablePositions = targetablePositions.SelectMany(tp => tp.TargetablePositions(this)).ToArray();
 			});
 

OpenRA.Mods.Common/Traits/Husk.cs

@@ -18,7 +18,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[Desc("Spawns remains of a husk actor with the correct facing.")]
-	public class HuskInfo : ITraitInfo, IOccupySpaceInfo, IFacingInfo, IActorPreviewInitInfo
+	public class HuskInfo : ITraitInfo, IPositionableInfo, IFacingInfo, IActorPreviewInitInfo
 	{
 		public readonly HashSet<string> AllowedTerrain = new HashSet<string>();
 
@@ -41,6 +41,13 @@ namespace OpenRA.Mods.Common.Traits
 		}
 
 		bool IOccupySpaceInfo.SharesCell { get { return false; } }
+
+		public bool CanEnterCell(World world, Actor self, CPos cell, Actor ignoreActor = null, bool checkTransientActors = true)
+		{
+			// IPositionable*Info*.CanEnterCell is only ever used for things like exiting production facilities,
+			// all places relevant for husks check IPositionable.CanEnterCell instead, so we can safely set this to true.
+			return true;
+		}
 	}
 
 	public class Husk : IPositionable, IFacing, ISync, INotifyCreated, INotifyAddedToWorld, INotifyRemovedFromWorld,