Description
This patch fixes the Scroll Bar rect calculation when Wnd->ExStyle & WS_EX_LEFTSCROLLBAR
http://doxygen.reactos.org/d4/ddf/ntuser_2scrollbar_8c_af8a79a747c5e0d5817ab39db283aff4a.html#af8a79a747c5e0d5817ab39db283aff4a
Btw, the Wine's version of IntGetScrollBarRect called GetScrollBarRect
http://source.winehq.org/source/dlls/user32/scroll.c#L215
seems to calculate Thumb positions.
It would be cool to check if we need those calculations too, or if we don't at all