TreeView notifications fix

[Mike Hearn]

> I couldn't figure out how to tell for sure what type a given window is
> under Windows (in wine you can watch the traces). Is there a way, using
> a spy tool or something?

Oh, found out a way, it turns out Spy++ puts "(Unicode)" next to the
window proc address if it's unicode, but doesn't put anything next to it
if it's ANSI, hence the fact that I didn't realise it'd tell you...
sorry :/

-- 
Mike Hearn <m.hearn at signal.qinetiq.com>
QinetiQ - Malvern Technology Center