fix definition of int64 and uint64
fix definition of int64 and uint64

neutrinofoundation/neutrino-digital-currency,coinkeeper/2015-06-22_18-46_razor,neutrinofoundation/neutrino-digital-currency,razor-coin/razor,coinkeeper/2015-06-22_18-46_razor,razor-coin/razor,razor-coin/razor,neutrinofoundation/neutrino-digital-currency,razor-coin/razor,neutrinofoundation/neutrino-digital-currency,coinkeeper/2015-06-22_18-46_razor,coinkeeper/2015-06-22_18-46_razor,razor-coin/razor,coinkeeper/2015-06-22_18-46_razor