Two small scrollbar fixes

[Alexandre Julliard]

Rein Klazes <wijn at wanadoo.nl> writes:

> dlls/user	: scroll.c
> dlls/user/tests	: win.c
> 
> - GetScrollRange should return an empty range, both upper and lower
> limit zero, if the window has no scrollbars (msdn);
> - GetScrollInfo's return value is FALSE if the window has no scrollbars;

This breaks the message test:

msg.c:2761: Test failed: GetScrollInfo error 5
msg.c:2761: Test failed: GetScrollInfo error 5

-- 
Alexandre Julliard
julliard at winehq.org