Objective C lexer - small cleanup

[Neil Booth]

Neil Booth wrote:-

> Stan Shebs wrote:-
> 
> > > It's my understanding that macro expansion after @ is only wanted for
> > > string constants.  Stan?
> > 
> > That's right.
> 
> Ah, OK.  I didn't realise that; things are simpler than I thought.
> Yes, we should make '@' a leading character for ObjC, then.

Doh.  You've confused me now.  My excuse is I've been away for the
weekend.

Neil.