remove useless member "has_title" from the private struct and simply set

remove useless member "has_title" from the private struct and simply set

2007-09-11  Michael Natterer  <mitch@imendio.com>

	* gtk/gtkfilechooserbutton.c: remove useless member "has_title"
	from the private struct and simply set the default title in
	constructor() whenever we create a dialog or the supplied one has
	no title. Also accept RESPONSE_ACCEPT *and* RESPONSE_OK as
	affirmative responses and document that accordingly. Fixes bug
	#436576. Fixed all compiler warnings in the file.

svn path=/trunk/; revision=18796