Minor cleanups suggested by CodeCenter.

	Minor cleanups suggested by CodeCenter.
	* aoutx.h, coffgen.c, ecoff.c, ecofflink.c, elf.c, libbfd.c,
	linker.c, reloc.c, section.c, srec.c: Added /*ARGSUSED*/ as
	appropriate.
	* aoutx.h (struct external_exec): Removed unnecessary declaration.
	(NAME(aout,some_aout_object_p)): Set some tdata pointers to NULL.
	(adjust_z_magic): Removed useless variable data_vma.
	(stringtab_init): Initialize hash_zero.
	(add_to_stringtab): Removed unused fourth argument.
	(NAME(aout,swap_std_reloc_out)): Removed useless variable
	r_addend.
	(aout_link_input_section): Added some casts.
	* archive.c (get_extended_arelt_filename, do_slurp_coff_armap,
	bfd_ar_hdr_from_filesystem, bsd_write_armap, coff_write_armap):
	Minor code rewriting to make it more C like.
	(do_slurp_bsd_armap): Added some casts.
	* ecoff.c (ecoff_write_object_contents): Removed useless variable
	scn_base.
	(ecoff_write_armap): Added some casts.  Use "" rather than "\0".
	* ecofflink.c (bfd_ecoff_write_debug): Added a cast.
	* libaout.h (struct internal_exec): Removed unnecessary
	declaration.
	* linker.c (_bfd_generic_indirect_link_order): Added a cast.
	* opncls.c (new_bfd): Removed a cast.
	* reloc.c (bfd_generic_get_relocated_section_contents): Added
	some casts.
	* srec.c (internal_srec_write_object_contents): Removed useless
	variable bytes_written.