Implement "gravity" for RTL mode in a better way: Keep the distance from

Implement "gravity" for RTL mode in a better way: Keep the distance from

Sat Dec 13 00:39:24 2003  Matthias Clasen  <maclas@gmx.de>

	* gtk/gtkviewport.c (viewport_set_hadjustment_values): Implement
	"gravity" for RTL mode in a better way: Keep the distance from
	the upper end of the page to the upper bound constant. This also
	fixes problems with the initial position of the viewport in RTL
	mode.  (#129063)