Having a SCROLL_DrawNCScrollBar() in scroll.c enables it to access global variables there. So that
global variables access in SCROLL_DrawScrollBar() can be moved outside of it and
SCROLL_DrawScrollBar() can then be refactored into a function without access to global variables.
Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>