Can't read gtk-double-click-time property

[Lars Clausen <lrclause cs uiuc edu>]

I'm trying to get the default setting for gtk-double-click-time, but can't
seem to get it out of the GtkSettings object.  Here's what I do:

    GtkSettings *settings = gtk_settings_get_default();
    GValue dctvalue;
    if (settings == NULL) {
      g_message(_("Couldn't get GTK settings"));
    } else {
      g_object_get(G_OBJECT(settings), 
		   "gtk-double-click-time", &dctvalue, NULL);
      if (g_type_is_a(G_VALUE_TYPE(&dctvalue), G_TYPE_INT)) {
	double_click_time = g_value_get_int(&dctvalue);
      }
    }

The settings are non-null, but g_object_get doesn't give me the value.  I
also get this error:

(lt-dia:1687): GLib-GObject-CRITICAL **: file gvaluetypes.c: line 820 (g_strdup_value_contents): assertion `G_IS_VALUE (value)' failed

The whole settings/value thing is sparsely documented, but I think I'm
doing the right thing.  I also tried with g_object_get_property, same
result.  Listing the properties with g_object_class_list_properties shows
that the property does indeed exist.  But both the type and the value I get
is null.  I don't see the double click time setting in Gnome Control
Center, either.

-Lars

-- 
Lars Clausen (http://shasta.cs.uiuc.edu/~lrclause)| Hårdgrim of Numenor
"I do not agree with a word that you say, but I   |----------------------------
will defend to the death your right to say it."   | Where are we going, and
    --Evelyn Beatrice Hall paraphrasing Voltaire  | what's with the handbasket?