handle 0-height empty/invisible lines.

handle 0-height empty/invisible lines.

2001-04-21  Havoc Pennington  <hp@pobox.com>

	* gtk/gtktextdisplay.c (gtk_text_layout_draw): handle 0-height
	empty/invisible lines.

	* gtk/gtktextiter.c (gtk_text_iter_set_visible_line_offset)
	(gtk_text_iter_set_visible_line_index): new functions to set
	indexes excluding invisible text

	* gtk/gtktextlayout.c (line_display_iter_to_index): get visible
	index

	* gtk/gtktextiter.c (gtk_text_iter_get_visible_line_index)
	(gtk_text_iter_get_visible_line_offset): new functions to
	get indexes excluding invisible text

	* gtk/gtkmessagedialog.c (gtk_message_dialog_init): strip out a
	bunch of extra padding that served no purpose

	* gtk/gtkdialog.c: Make all the spacings configurable via style
	properties, for chubbiness configuration in themes

	* tests/testtext.c: fix path to the immodules.