txmempool check() fixes relatd to conflicts
txmempool check() fixes relatd to conflicts


Former-commit-id: 9d250374970bc32783a9f4b33202825ec95e6523
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin