Fix d2k NukePower sequence requirement

OpenRA.Mods.Common/Traits/SupportPowers/NukePower.cs

@@ -75,8 +75,11 @@ namespace OpenRA.Mods.Common.Traits
 			else
 				Sound.Play(Info.IncomingSound);
 
-			var wsb = self.Trait<WithSpriteBody>();
-			wsb.PlayCustomAnimation(self, info.ActivationSequence);
+			if (!string.IsNullOrEmpty(info.ActivationSequence))
+			{
+				var wsb = self.Trait<WithSpriteBody>();
+				wsb.PlayCustomAnimation(self, info.ActivationSequence);
+			}
 
 			var targetPosition = self.World.Map.CenterOfCell(order.TargetLocation);
 			var missile = new NukeLaunch(self.Owner, info.MissileWeapon,

mods/d2k/rules/structures.yaml

@@ -808,6 +808,7 @@ palace:
 		DisplayBeacon: True
 		DisplayRadarPing: True
 		CameraActor: camera
+		ActivationSequence:
 	CanPowerDown:
 	DisabledOverlay:
 	RequiresPower:

mods/ts/sequences/structures.yaml

@@ -1163,7 +1163,7 @@ namisl:
 	make: ntmislmk
 		Length: 18
 		ShadowStart: 18
-	active: ntmisl_a
+	active: ntmisl_a # TODO: This is an overlay
 		Length: 10
 		Tick: 80
 	damaged-active: ntmisl_a