* elf-bfd.h (_bfd_elf_section_from_bfd_section): Update prototype.

	* elf-bfd.h (_bfd_elf_section_from_bfd_section): Update prototype.
	* elf.c (_bfd_elf_section_from_bfd_section): Return unsigned int,
	SHN_BAD on error.
	(_bfd_elf_print_private_bfd_data): Test for SHN_BAD result from
	_bfd_elf_section_from_bfd_section, not -1.
	(swap_out_syms): Likewise.
	* elflink.c (elf_link_add_object_symbols): Likewise.
	(bfd_elf_get_bfd_needed_list): Likewise.
	(bfd_elf_match_symbols_in_sections): Likewise.
	(elf_link_add_object_symbols): Don't bother testing for symbols
	using normal sections before calling bfd_section_from_elf_index.
	(elf_link_input_bfd, bfd_elf_final_link): Likewise.
	(bfd_elf_reloc_symbol_deleted_p): Likewise.
	* elfcode.h (elf_slurp_symbol_table): Likewise.
	* elf32-spu.c (get_sym_h): Likewise.
	* elf32-xtensa.c (get_elf_r_symndx_section): Likewise.
	* elf64-ppc.c (opd_entry_value, get_sym_h, ppc64_elf_edit_toc): Ditto.
	* elf64-sh64.c (sh_elf64_get_relocated_section_contents): Likewise.