Fix crash in ns_mouse_position (bug#44313)

* src/nsterm.m (ns_destroy_window): Close the window before freeing
the frame resources so we don't end up accessing the frame struct
after it's been freed.

(cherry picked from commit 18a7267c32)

src/nsterm.m

@@ -1657,6 +1657,8 @@ ns_destroy_window (struct frame *f)
 {
   NSTRACE ("ns_destroy_window");
 
+  check_window_system (f);
+
   /* If this frame has a parent window, detach it as not doing so can
      cause a crash in GNUStep.  */
   if (FRAME_PARENT_FRAME (f) != NULL)
@@ -1667,7 +1669,7 @@ ns_destroy_window (struct frame *f)
       [parent removeChildWindow: child];
     }
 
-  check_window_system (f);
+  [[FRAME_NS_VIEW (f) window] close];
   ns_free_frame_resources (f);
   ns_window_num--;
 }