Ming-Hung Tsai 6dc9a90fec [counting_visitor] fix unnecessary value visiting
1. Do not inherit btree_damage_visitor to avoid unnecessary
   value visiting.
   (reverts commit b22495997a8bf427741225ef86edf267ee746d7c)
2. Use btree_node_checker to do node checking
2016-04-05 16:09:58 +08:00
..