* dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info):

	* dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info):
	Change read_shndx type to unsigned int.
	(Sized_dwarf_line_info::read_lines): Change shndx type to unsigned
	int.
	(Sized_dwarf_line_info::read_line_mappings): Likewise.
	* dwarf_reader.h (Sized_dwarf_line_info::Sized_dwarf_line_info):
	Change read_shndx type to unsigned int.
	(Sized_dwarf_line_info::read_lines): Change shndx type to unsigned
	int.
	(Sized_dwarf_line_info::read_line_mappings): Likewise.
	* layout.cc (Layout::create_symtab_sections): Cast the result of
	local_symcount * symsize to off_t in the gold_assert.