Fix derived class overload problem.

Fix derived class overload problem.

2010-11-04  Sami Wagiaalla  <swagiaal@redhat.com>

	* gdbtypes.h (struct rank): Created subrank.
	* gdbtypes.c: Initialized subrank for all
	'BADNESS' constants.
	(distance_to_ancestor): New function.
	(is_ancestor): Use distance_to_ancestor.
	(is_public_ancestor): Ditto.
	(sum_ranks): Handle subrank.
	(compare_ranks): Ditto.
	(rank_one_type): Subrank base conversions.

2010-11-04  Sami Wagiaalla  <swagiaal@redhat.com>

	* gdb.cp/overload.exp: Added test for inheritance
	overload.
	* gdb.cp/overload.cc: Ditto.
	* gdb.cp/oranking.exp: Removed releveant kfails.