* ar.c (print_contents): Cast args of bfd_seek to the right types.

	* ar.c (print_contents): Cast args of bfd_seek to the right types.
	Replace bfd_read call with call to bfd_bread.
	(extract_file): Likewise.

	* objdump.c (dump_section_header): Cast section->filepos to
	unsigned long to suit printf format string.
	* readelf.c (process_section_headers): Similarly for sh_offset.
	(process_unwind): Likewise.