wxMAC, crash in wxListBox

[Stefan Csomor]

Hi 

>  Thanks for the explanation, but we still have a problem 
> though. Either we should make RTTI mandatory for wxMac port 
> or (preferably) avoid using it inside wx itself. Stefan, is 
> it really necessary to use dynamic_cast instead of, say, 
> wx_dynamic_cast here?

it is also used in mix-in situations, so our own basic RTTI isn't going
to be a clean 1:1 replacement, but I'll try to make it work

Best,

Stefan