changed tree_node struct and function prototypes
changed tree_node struct and function prototypes

cHoco/kwm,a-morales/kwm,koekeishiya/kwm,a-morales/kwm,akdor1154/kwm,koekeishiya/kwm,a-morales/kwm,akdor1154/kwm,koekeishiya/kwm,cHoco/kwm,cHoco/kwm,akdor1154/kwm