winedevice: Use WINE_RB_FOR_EACH_ENTRY_DESTRUCTOR to free drivers in async_shutdown_drivers.

[Sebastian Lackner]

On 15.02.2017 16:47, Jacek Caban wrote:
> Signed-off-by: Jacek Caban <jacek at codeweavers.com>
> ---
>  programs/winedevice/device.c | 30 +++++++++++++++---------------
>  1 file changed, 15 insertions(+), 15 deletions(-)

This isn't really a noop, the previous code also cleared tree->root.