Fix crash when closing program during task

src/FileHelper.cake

@@ -1690,6 +1690,9 @@ Depending on the error, open the UserData.cakedata file in a text editor and see
       (SDL_Log "error: failed to save state")))
   (load-save-shutdown)
 
+  ;; We need to wait for all tasks to complete before we start destroying things they might be using
+  (task-system-shutdown)
+
   (destroy-directory-state (addr listing-state))
   (strdict-free g-userdata-dict)
   (dict-free g-categories-dict)
@@ -1701,8 +1704,7 @@ Depending on the error, open the UserData.cakedata file in a text editor and see
 
   (treemap-opengl-shutdown)
   (free-treemap-file-system-multithreaded-state g-treemap-multithreaded-state)
-  (dynarray-free g-userdata-output-dir)
-  (task-system-shutdown)))
+  (dynarray-free g-userdata-output-dir)))
 
 ;;
 ;; Introspection helpers