* class.c (copy_virtuals): New function.
(build_primary_table): Use it.
(build_secondary_vtable): Likewise.
(modify_vtable_entry): Use NULL_TREE, not integer_zero_node, to
indicate that no vcall offset is required.
(add_virtual_function): Likewise.
(modify_all_vtables): Likewise.
(dfs_finish_vtbls): Adjust call to build_vtbl_initializer.
(dfs_accumulate_vtbl_inits): Likewise.
(build_vtbl_initializer): Make changes to handle construction
vtables.
(dfs_build_vcall_offset_vtbl_entries): Likewise.
(build_rtti_vtbl_entries): Likewise.
(build_vtable_entries): Handle a NULL vcall_index.
From-SVN: r33944
