user32: search more aggressively for a window under a tooltip

[Daniel Jelinski]

2012/7/23, Alexandre Julliard <julliard at winehq.org>:
> You can't assume that the other Wine window is directly underneath the
> transparent one, there may be some other X windows in between that
> should receive the click instead.

I just determined that in such cases Windows (at least 2008) silently
eats the event - no windows get any click events. I can send the
application (VS, C++) I used for testing.

Should I update the patch to reflect that?

Daniel