adding a property to the spinbutton widget

[timf <timf trdlnk com>]

hello all,
  i am trying to figure out how to add a property to the spinbutton widget, 
which can be set from a gtkrc(-2.0) file.  the property is arrow layout, and 
the options would be one on top of the other (as is current), or side by 
side.

i added a new enumerated value (PROP_ARROWS_SIDE_BY_SIDE) to
the properties enumeration, and cases to the switch statements in the get and
set properties functions, and in gtk_spin_button_class_init, i added:

g_object_class_install_property(gobject_class,
                                  PROP_ARROWS_SIDE_BY_SIDE,
                                  g_param_spec_boolean ("arrows_side_by_side",
                                                        _("Layout of arrows"),
                                                        _("Whether to lay the 
arrows side by side, or not"),
                                                        FALSE,
                                                        G_PARAM_READWRITE));

now i can explicitly set and get this property, but i have a 
simple .gtkrc-2.0, which has the following:

style "tradelink-spinbutton"
{
  font_name = "sans 12"
  GtkSpinButton::arrows_side_by_side = TRUE
  GtkSpinButton::value = 42
}


class "GtkSpinButton"      style "tradelink-spinbutton"


and my new property isn't getting set for all spinbuttons as they are 
instantiated.  could someone tell me what i forgot to add to make this 
happen?

thanks!
-tim