Patch to ignore invalid symbol section index.

[Nick Clifton]

Hi H.J.

> 2001-02-13  H.J. Lu  <hjl@gnu.org>
> 
>         * elflink.h (elf_link_input_bfd): Ignore invalid symbol section
>         index.

Approved (or rather your tweeked version which does not produce the
warning ig he modification is a null op is approved).

Cheers
        Nick