put back obviously-not-redundant resize

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42026 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/win_gtk.c

@@ -607,6 +607,8 @@ gtk_pizza_size_allocate (GtkWidget     *widget,
             gdk_window_resize( widget->window, w, h );
         else
             gdk_window_move_resize( widget->window, x, y, w, h );
+
+        gdk_window_resize( pizza->bin_window, w, h );
     }
 
     children = pizza->children;