Skip check for ITemporaryBlocker entirely if rules don't contain any temporary blockers

This benefits all mods without temporary blockers like gates or energy walls.

OpenRA.Game/Traits/TraitsInterfaces.cs

@@ -299,6 +299,8 @@ namespace OpenRA.Traits
 		void SetVisualPosition(Actor self, WPos pos);
 	}
 
+	public interface ITemporaryBlockerInfo : ITraitInfoInterface { }
+
 	[RequireExplicitImplementation]
 	public interface ITemporaryBlocker
 	{

OpenRA.Game/World.cs

@@ -149,6 +149,8 @@ namespace OpenRA
 			}
 		}
 
+		public bool RulesContainTemporaryBlocker { get; private set; }
+
 		internal World(ModData modData, Map map, OrderManager orderManager, WorldType type)
 		{
 			Type = type;
@@ -185,6 +187,8 @@ namespace OpenRA
 				MapUid = Map.Uid,
 				MapTitle = Map.Title
 			};
+
+			RulesContainTemporaryBlocker = map.Rules.Actors.Any(a => a.Value.HasTraitInfo<ITemporaryBlockerInfo>());
 		}
 
 		public void AddToMaps(Actor self, IOccupySpace ios)

OpenRA.Game/WorldUtils.cs

@@ -45,6 +45,9 @@ namespace OpenRA
 
 		public static bool ContainsTemporaryBlocker(this World world, CPos cell, Actor ignoreActor = null)
 		{
+			if (!world.RulesContainTemporaryBlocker)
+				return false;
+
 			var temporaryBlockers = world.ActorMap.GetActorsAt(cell);
 			foreach (var temporaryBlocker in temporaryBlockers)
 			{