core: fixed unwinding bad hash (#3347)
core: fixed unwinding bad hash (#3347)

Fixed unwinding of bad hashes when already on the canon chain
maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum,maran/go-ethereum