* cpphash.c (struct macro_info): Add new members.
	(_cpp_free_definition): Delete the macro directly.
	(count_params): Return void, with first token of
	expansion in struct macro_info on success.
	(parse_define): Return int.  Hoist syntax checking from
	save_macro_expansion.  Leave call to save_expansion to
	_cpp_create_definition.
	(alloc_macro): Needs just 2 arguments.
	(free_macro): Delete.
	(save_expansion): Don't perform syntax check.
	(_cpp_create_definition): Call save_expansion.

From-SVN: r35025