if we destroy the same window twice, log a warning and avoid calling …

…gtk's destroy function twice

git-svn-id: https://xpra.org/svn/Xpra/trunk@11653 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/client/gtk_base/gtk_client_window_base.py

@@ -987,13 +987,17 @@ def move_resize(self, x, y, w, h, resize_counter=0):
         self._set_backing_size(w, h)
 
 
+    def noop_destroy(self):
+        log.warn("Warning: window destroy called twice!")
+
     def destroy(self):
         if self._client._set_window_menu:
             self._client.set_window_menu(False, self._id, {})
         self.on_realize_cb = {}
         ClientWindowBase.destroy(self)
         gtk.Window.destroy(self)
         self._unfocus()
+        self.destroy = self.noop_destroy
 
 
     def do_unmap_event(self, event):