Wed Oct 20 19:45:49 1999  George Lebl  <jirka@5z.com>

        * session.c: remove some unused code and set ss_timeout_dlg to
          NULL when the dialog is destroyed

        * panel_config.c: fix warnings by casting during freeze/thaw

        * panel-widget.[ch],button-widget.[ch],rgb-stuff.[ch]: scale
          background pixmap when tiling and cache the button in an X
          pixmap so that we don't compose it over and over.  Now we
          are too cautious with the cache, dumping it all the time,
          a lot of improvements in speed can still be gained here.