Fix error on attempt to reload actions when the game is shutting down.

Assets/Cryville/Crtr/Browsing/UI/PathedResourceBrowser.cs

@@ -37,10 +37,12 @@ namespace Cryville.Crtr.Browsing.UI {
 		readonly HashSet<int> _selectedItems = new HashSet<int>();
 		readonly Dictionary<int, BrowserItem> _items = new Dictionary<int, BrowserItem>();
 
+		bool _destroyed;
 		protected virtual void Start() {
 			m_itemContainer.LoadItem = LoadItem;
 		}
 		void OnDestroy() {
+			_destroyed = true;
 			UnregisterManager();
 		}
 		void UnregisterManager() {
@@ -124,6 +126,7 @@ namespace Cryville.Crtr.Browsing.UI {
 			}
 		}
 		internal override void OnActionsChanged() {
+			if (_destroyed) return;
 			if (_selectedItems.Count == 1) {
 				LoadActions(_manager[_selectedItems.Single()]);
 			}