* class.c (struct vtbl_init_data_s): Remove last_init field.
	(struct secondary_vptr_vtt_init_data_s): Change type of inits field
	to a VEC.
	(finish_vtbls): Use a VEC rather than a TREE_LIST for the accumulated
	initializers.
	(build_vtt): Likewise.
	(initialize_vtable): Take a VEC instead of a tree.
	(build_vtt_inits): Change return type to void.  Take a VEC **
	instead of a tree *; accumulate results into said VEC.
	(build_ctor_vtbl_group): Use a VEC rather than a TREE_LIST for the
	accumulated initializers.  Pass the vtable to accumulate_vtbl_inits.
	(accumulate_vtbl_inits): Add extra vtable tree parameter; take a VEC
	instead of a tree.
	(dfs_accumulate_vtbl_inits): Likewise.  Change return type to void.
	(build_vtbl_initializer): Add VEC parameter; accumulate initializers
	into it.
	(dfs_build_secondary_vptr_vtt_inits): Use CONSTRUCTOR_APPEND_ELT
	rather than tree_cons.
	(build_vbase_offset_vtbl_entries): Likewise.
	(add_vcall_offset): Likewise.
	(build_rtti_vtbl_entries): Likewise.
	* cp-tree.h (initialize_artificial_var): Take a VEC instead of a tree.
	* decl.c (initialize_artificial_var): Use build_constructor instead
	of build_constructor_from_list.

From-SVN: r160233