* symfile.c (alloc_section_addr_info): Update header. Don't set

	* symfile.c (alloc_section_addr_info): Update header.  Don't set
	'num_sections' field.
	(build_section_addr_info_from_section_table): Set 'num_sections'.
	(build_section_addr_info_from_bfd): Likewise.
	(build_section_addr_info_from_objfile): Remove dead loop
	condition.
	(free_section_addr_info): Unconditionally call xfree.
	(relative_addr_info_to_section_offsets, addrs_section_sort)
	(addr_info_make_relative, syms_from_objfile_1): Remove dead loop
	condition.
	(syms_from_objfile_1): Remove dead 'if' condition.  Check
	'num_sections'.
	(add_symbol_file_command): Set 'num_sections'.
	* symfile-mem.c (symbol_file_add_from_memory): Set
	'num_sections'.
	* somread.c (som_symfile_offsets): Remove dead loop condition.
	* machoread.c (macho_symfile_offsets): Remove dead 'if'.
	* jit.c (jit_bfd_try_read_symtab): Set 'num_sections'.