cast NULL to GtkItemFactoryCallback to ensure proper type (SunPro cc

cast NULL to GtkItemFactoryCallback to ensure proper type (SunPro cc

* gtk/gtkitemfactory.c: cast NULL to GtkItemFactoryCallback to
ensure proper type (SunPro cc complains)

* gtk/gtklist.c: removed bogus '*' from "*GTK_CONTAINER_CLASS"

* gtk/gtktogglebutton.c: use our own draw method so we get proper
redraws on active state

-Yosh