* libnautilus-extensions/nautilus-art-extensions.c:
	(nautilus_art_irect_align):
	* libnautilus-extensions/nautilus-art-extensions.h:
	New function to align a rectangle within another.

	* libnautilus-extensions/nautilus-image.c:
	(image_get_pixbuf_bounds):
	* libnautilus-extensions/nautilus-label.c: (label_get_text_bounds):
	Share more code between these two widgets by using a common
	alignment routine.