Part of the motivation for this patch is to eliminate variables
named "stream", in order to avoid confusion with audio streams.

It also avoids cases where both "flow" and "stream" are passed to
the same function, conveying the same information.
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Andrew Eikum <aeikum@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>