GTK+ freeze break request

[Matthias Clasen <matthias clasen gmail com>]

Torsten pointed out an issue with some new api in GTK+ 2.16 that will
cause difficulties for object-oriented bindings, unless we fix it now:

http://bugzilla.gnome.org/show_bug.cgi?id=574561

The problem is that

gtk_style_get_property (a new function to obtain a style property) clashes with
g_object_get (the existing function to get object properties) when
they turn into
style.get() in an object-oriented language.

The proposal is to rename gtk_style_get_property to
gtk_style_get_style_property.
A google code search for gtk_style_get_property comes up empty.

I'm pretty convinced that it is the right choice to do this
last-minute fix now, before the problematic function becomes part of
the stable 2.16 api. But I am willing to listen to
counter-arguments....