[PATCH] bfd: Fix warning when compiling with clang, fix buglet

[Nick Clifton]

Hi Simon,

> bfd/ChangeLog:
> 
> 	* elf64-ppc.c (ppc64_elf_archive_symbol_lookup): Avoid pointer
> 	arithmetic on NULL pointer.
> 	* elflink.c (_bfd_elf_archive_symbol_lookup,
> 	elf_link_add_archive_symbols): Likewise.
> 
> ld/ChangeLog:
> 
> 	* ldexp.c (fold_name, exp_fold_tree_1): Avoid pointer arithmetic
> 	on NULL pointer.

I have applied your revised patch.

Cheers
  Nick