An autocomplete object can be destroyed and detached from the edit control and
still survive, if there are still references to it (even though it's useless).
Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>