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.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@85886 138bc75d-0d04-0410-961f-82ee72b054a4