PR c++/16273
* class.c (count_depth_data): New type.
(dfs_depth_post): New function.
(dfs_depth_q): Likewise.
(find_final_overrider_data_s): Change type of vpath.
Add vpath_list.
(dfs_find_final_overrider_1): New function.
(dfs_find_final_overrider): Use it.
(dfs_find_final_overrider_q): Adjust use of vpath.
(dfs_find_final_overrider_post): Likewise.
(find_final_overrider): Use dfs_depth. Allocate and deallocate
vpath_list.
From-SVN: r85886
