Add 16x16 versions of the zoom icons and of
	GTK_STOCK_INDEX. Some of the images were taken from
	the hicolor icon theme, and were originally created
	by Jakub Steiner and Tuomas Kuosmanen. 	(#167515,
	Vincent Noel)

	* gtk/stock-icons/stock_index_16.png:
	* gtk/stock-icons/stock_zoom_1_16.png:
	* gtk/stock-icons/stock_zoom_fit_16.png:
	* gtk/stock-icons/stock_zoom_in_16.png:
	* gtk/stock-icons/stock_zoom_out_16.png: New images.

	* gtk/stock-icons/Makefile.am: Add the new images.