If we're convering an mp_int to a CassDecimal and the result is a zero-length array of cass_byte_t that's not accepted by Cassandra, convert it to an array of 1 zero byte instead.
If we're convering an mp_int to a CassDecimal and the result is a zero-length array of cass_byte_t that's not accepted by Cassandra, convert it to an array of 1 zero byte instead.

flightaware/casstcl,flightaware/casstcl,flightaware/casstcl