Fixed boost > v1.56 compatibility
Fixed boost > v1.56 compatibility

https://github.com/ghostlander/Feathercoin/commit/ba72630653896ad943521d54cce2acce0e8aff57

dopecoin-dev/DopeCoinV3,dopecoin-dev/DopeCoinV3,dopecoin-dev/DopeCoinV3,dopecoin-dev/DopeCoinV3,dopecoin-dev/DopeCoinV3