Invalid MERKLE_UPDATE TL-B Schema

[andreypfau]

Expected:

!merkle_update#04 {X:Type} old_hash:bits256 new_hash:bits256 old_depth:uint16 new_depth:uint16
    old:^X new:^X = MERKLE_UPDATE X;

Actual:

!merkle_update#02 {X:Type} old_hash:bits256 new_hash:bits256
  old:^X new:^X = MERKLE_UPDATE X;

• Invalid constructor ID, expected: #04, actual: #02
• Missing old_depth & new_depth fields