bugfix: decode_hex_digest should let decode_hex handle the string decoding stuff. just check the returned number of bytes is correct.
bugfix: decode_hex_digest should let decode_hex handle the string decoding stuff. just check the returned number of bytes is correct.

libmetrocoin/libmetrocoin-consensus,Airbitz/libbitcoin,Airbitz/libbitcoin,GroestlCoin/libgroestlcoin,swansontec/libbitcoin,Airbitz/libbitcoin,GroestlCoin/libgroestlcoin,libmetrocoin/libmetrocoin-consensus,libmetrocoin/libmetrocoin-consensus,swansontec/libbitcoin,kaostao/libbitcoin,BWallet/libbitcoin,libtetcoin/libtetcoin-consensus,Airbitz/libbitcoin,BWallet/libbitcoin,libtetcoin/libtetcoin-consensus,libtetcoin/libtetcoin-consensus,kaostao/libbitcoin,libtetcoin/libtetcoin-consensus,swansontec/libbitcoin,BWallet/libbitcoin,libmetrocoin/libmetrocoin-consensus,GroestlCoin/libgroestlcoin,kaostao/libbitcoin,libmetrocoin/libmetrocoin-consensus,kaostao/libbitcoin,GroestlCoin/libgroestlcoin,swansontec/libbitcoin,libtetcoin/libtetcoin-consensus,BWallet/libbitcoin