[Gambas-user] Fixing bug tracker issue 78

[Benoît Minisini]

> 
> Sorry, I'm really panicky, I meant method overriding not polymorphism.
> Bruce

This change only makes the interpreter raise an error instead of eventually 
segfaulting, by preventing something that is forbidden : changing the 
signature of a method through inheritance.

That has nothing to do with virtual dispatching : the overridden method is 
always called.

-- 
Benoît Minisini