on DC once supply goes back to 0 unset supply flag
on DC once supply goes back to 0 unset supply flag


Former-commit-id: 408b3f458a2b7063618cf9113b87f5774a3b17c7
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin