* breakpoint.c (remove_sal): New.

	* breakpoint.c (remove_sal): New.
	(expand_line_sal_maybe): New.
	(create_breakpoints): Call expand_line_sal_maybe.
	(clear_command): Add comment.
	(breakpoint_re_set_one): Call expand_line_sal_maybe.
	* linespec.c (decode_indirect): Set explicit_pc to 1.
	(decode_all_digits): Set explicit_line to 1.
	(append_expanded_sal): New.
	(expand_line_sal): New.
	* linespec.h (expand_line_sal): Declare.
	* symtab.c (init_sal): Initialize explicit_pc
	and explicit_line.
	* symtab.h (struct symtab_and_line): New fields
	explicit_pc and explicit_line.