invalidate the line containing start, even if the [start,end) range is

invalidate the line containing start, even if the [start,end) range is

2002-03-23  Havoc Pennington  <hp@pobox.com>

	* gtk/gtktextlayout.c (gtk_text_layout_real_invalidate):
	invalidate the line containing start, even if the [start,end)
	range is empty (just invalidate [start,end], essentially).
	Partially fixes #72374