fix leak introduced by r53753

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53799 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/menu.cpp

@@ -1216,7 +1216,8 @@ wxMenuItem *wxMenu::DoRemove(wxMenuItem *item)
     }
 
     gtk_menu_item_set_submenu(GTK_MENU_ITEM(mitem), NULL);
-    gtk_container_remove(GTK_CONTAINER(m_menu), mitem);
+    gtk_widget_destroy(mitem);
+    item->SetMenuItem(NULL);
 
     return item;
 }