Resizing GtkList in GtkCombo

[vladimir <vladeck sezampro yu>]

Good day,
Developers!

I'm using GtkCombo, but want to drop-down (GtkList), to be bigger
(height). I'm currently using gtk_widget_set_usize (...) func that is
deprecated. Since I'm using GTK+ 2, what other func can I use instead?
And, what will replace GtkList in GtkCombo, since it is deprecated, too?

Thanks,
Vladimir.