Fix error when trying to change layer that doesn't exist in SpriteChange and SpriteStateChange.

Content.Server/Construction/Completions/SpriteChange.cs

@@ -1,4 +1,5 @@
 #nullable enable
+using System;
 using System.Threading.Tasks;
 using Content.Shared.Construction;
 using JetBrains.Annotations;
@@ -27,6 +28,9 @@ namespace Content.Server.Construction.Completions
 
             if (!entity.TryGetComponent(out SpriteComponent? sprite)) return;
 
+            // That layer doesn't exist, we do nothing.
+            if (sprite.LayerCount <= Layer) return;
+
             sprite.LayerSetSprite(Layer, SpriteSpecifier);
         }
     }