facebook: Use generic marshaller for GObject signals
Since 2.30 it's been possible to use a default c_marshaller by
passing NULL to g_signal_new(). It has since become the recommended
way of creating signals.
https://developer.gnome.org/gobject/stable/howto-signals.html
This patch ports the Facebook prpl to use this method instead
of generating its own marshallers with glib-genmarshal.
#! /bin/sh
# Pidgin and Finch: The Pimpin' Penguin IM Clients That're Good for the Soul
# Copyright (C) 2003-2008 Gary Kramlich <grim@reaperworld.com>
#
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# Software Foundation; either version 2 of the License, or (at your option)
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#
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