* demos/gtk-demo/example_change_display.cc: Comment out the code that
	we cannot yet port because the C example has not been ported.
	See https://bugzilla.gnome.org/show_bug.cgi?id=638907
	This at least fixes distcheck so I can make a tarball release.
	* demos/gtk-demo/example_stockbrowser.cc: Revert my previous clear()->reset()
	change because this was actually meant to call Image::clear().