float tracewalk(entity e, vector start, vector m1, vector m2, vector end, float movemode);
-float navigation_markroutes_nearestwaypoints(entity this, entity waylist, float maxdist);
+float navigation_markroutes_nearestwaypoints(entity this, float maxdist);
float navigation_routetogoal(entity this, entity e, vector startposition);
void navigation_clearroute(entity this);