[Proof] Replace incorrect 0x with 0b in FrozenSubTreeIterator
[Proof] Replace incorrect 0x with 0b in FrozenSubTreeIterator

aptos-labs/aptos-core,libra/libra,libra/libra,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,libra/libra,aptos-labs/aptos-core