Consider up to 2 nodes to apply climb_factor

Author: Wuzzy2

src/client/localplayer.cpp

@@ -316,10 +316,15 @@ void LocalPlayer::move(f32 dtime, Environment *env,
 	if (!(is_valid_position && is_valid_position2)) {
 		is_climbing = false;
 	} else {
-		is_climbing = (nodemgr->get(node.getContent()).climbable ||
-			nodemgr->get(node2.getContent()).climbable) && !free_move;
+		bool climbable_upper = nodemgr->get(node.getContent()).climbable;
+		bool climbable_lower = nodemgr->get(node2.getContent()).climbable;
+		is_climbing = (climbable_upper || climbable_lower) && !free_move;
 		if (is_climbing) {
-			node_climb_factor = nodemgr->get(node.getContent()).climb_factor;
+			if (climbable_lower) {
+				node_climb_factor = nodemgr->get(node2.getContent()).climb_factor;
+			} else {
+				node_climb_factor = nodemgr->get(node.getContent()).climb_factor;
+			}
 		}
 	}