only one input in a sys tx needs to check inputs
only one input in a sys tx needs to check inputs


Former-commit-id: 2194759c26a8b8037075c3b1bd507fdfb4ec1778
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin