[rfa] as.c - always NULL terminate options list

[Andrew Cagney]

Nick Clifton wrote:
> 
> Hi Andrew,
> 
> : Tue Jul  4 14:08:28 2000  Andrew Cagney  <cagney@b1.cygnus.com>
> :
> :       * as.c (parse_args): Always NULL terminate the long option list.
> 
> Approved.

Thanks.  I'll check it in once I've fixed the buffer overflow introduced
by my buffer overflow fix (AlanM pointed out that I got the malloc()
size wrong).

	Andrew