Fix add mints to state once per denomination instead adding coin by coin
Fix add mints to state once per denomination instead adding coin by coin

zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin