2008-07-04  Michael Natterer  <mitch@imendio.com>

	Bug 541208 – Functions to easily install and use signals without
	class struct slot

	* gobject.symbols
	* gsignal.[ch] (g_signal_new_class_handler): the same as
	_gtk_binding_signal_new(), to install signals with a callback
	instead of a class struct slot as class closure.

	The next two functions are C convenience and much easier to use
	than the generic overriding and chaining APIs which are intended
	primarily for language bindings:

	(g_signal_override_class_handler): to override a signal with a
	callback instead of a class struct slot.

	(g_signal_chain_from_overridden_handler): to chain up from a
	signal without class struct slot. The API is similar to
	g_signal_emit().


svn path=/trunk/; revision=7157