const qualifier in function arguments

[Tim Lorenz <tim lorenz nu>]

Hi List,

i don't understand gtk+'s (and related libs) policy of handling
const qualifiers in function arguments. For example there is:

gtk_widget_modify_font(GtkWidget* ,PangoFontDescription* fn)

in gtk-1.3 tree. That function actually doesn't modify 'fn'
and i think it isn't supposed to. Why isn't this expressed
through a const qualifier?

  Tim