Functions to test the toolbar space style.

Functions to test the toolbar space style.

	* gtk/testgtk.c: Functions to test the toolbar space style.

	* gtk/gtktoolbar.c: Add a private GtkToolbarChildSpace subclass of
	GtkToolbarChild to hold allocation. Set default space style to
	GTK_TOOLBAR_SPACE_EMPTY, define SPACE_LINE_* for separator
	fraction defaults.
	(gtk_toolbar_paint_space_line): New function; paints the separator
	line, using "toolbar" as the detail.
	(gtk_toolbar_expose): (gtk_toolbar_draw): Handle CHILD_SPACE when
	style is set to SPACE_LINE.
	(gtk_toolbar_size_allocate): Store space allocations.
	(gtk_toolbar_insert_element): If we are a space, allocate and
	initialize a GtkToolbarChildSpace instead of a GtkToolbarChild.
	(gtk_toolbar_set_space_style): New function.

	* gtk/gtktoolbar.h: Add GtkToolbarSpaceStyle, with styles of EMPTY
	and LINE. Add prototype for gtk_toolbar_set_space_style.