kivy/kivy — pull request #1658 by matham (2013-11-30 04:47:36+00:00)
Title: Don't make the scrollbar larger than the widget.

When sizing a scrollview widget with e.g. a splitter we don't want the scrollbar to be visible while the widget itself is hidden (due to size zero). . So make sure the scrollbar is at most as large as the widget.