Avoid visibly resizing the file chooser at startup

Avoid visibly resizing the file chooser at startup
	* gtk/gtkfilechooserdefault.c (gtk_file_chooser_default_map):
	Don't change the default size in ::map() so we don't flicker...
	(gtk_file_chooser_default_realize): ... so do it in ::realize()
	instead, when the window is not yet visible.  This avoids a
	dialog-that-resizes when you first pop up the file chooser.
	(emit_default_size_changed): Just emit the signal; don't check for
	the widget's state so we can be emitted during the initial
	::realize() when we are not mapped yet.
	(update_preview_widget_visibility): Only emit default_size_changed
	if the widget is not mapped, to avoid resizing the dialog while it
	is visible.

Signed-off-by: Federico Mena Quintero <federico@novell.com>
svn path=/trunk/; revision=22117