* class.c (resolve_address_of_overloaded_function): Mark the
	chosen function used.
	* call.c (build_call): Make sure that a function coming in has
	been marked used already.
	* decl.c (expand_static_init): Call mark_used instead of
	assemble_external.
	* except.c (call_eh_info, do_pop_exception, expand_end_eh_spec,
	alloc_eh_object, expand_throw): Likewise.
	* init.c (build_builtin_delete_call): Likewise.
	* rtti.c (call_void_fn, get_tinfo_fn, build_dynamic_cast_1,
	expand_si_desc, expand_class_desc, expand_ptr_desc, expand_attr_desc,
	expand_generic_desc): Likewise.

From-SVN: r24862