use < and <= in isSyscoinConflictIsFirstSeen
use < and <= in isSyscoinConflictIsFirstSeen


Former-commit-id: f114510cb13e9811113a847ec3cef678b646df09
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin