Fix some machine construction bugs. (#18179)

Content.Server/Stack/StackSystem.cs

@@ -50,15 +50,15 @@ namespace Content.Server.Stack
             if (!Resolve(uid, ref stack))
                 return null;
 
+            // Try to remove the amount of things we want to split from the original stack...
+            if (!Use(uid, amount, stack))
+                return null;
+
             // Get a prototype ID to spawn the new entity. Null is also valid, although it should rarely be picked...
             var prototype = _prototypeManager.TryIndex<StackPrototype>(stack.StackTypeId, out var stackType)
                 ? stackType.Spawn
                 : Prototype(uid)?.ID;
 
-            // Try to remove the amount of things we want to split from the original stack...
-            if (!Use(uid, amount, stack))
-                return null;
-
             // Set the output parameter in the event instance to the newly split stack.
             var entity = Spawn(prototype, spawnPosition);