[PATCH v2] Do not classify C struct members as a filename

[Leszek Swirski via gdb-patches]

> This change makes sense (and thanks for updating that comment as well),
> but I wonder whether this changes the behavior in some case.  Elsewhere
> in lex_one_token there is a check of saw_structop:
>
>       else if (saw_structop)
>         return COMPLETE;
>
> Previously this return could only be taken if parse_completion was set,
> but now I think it could be taken in other situations.
>
> So, I suspect "parse_completion &&" should be stuck in there.

Nice catch, thanks! I looked at the other users of saw_structop and
last_was_structop, and it looks like this is the only location that
needs an update. PTAL at v4.