fix scala compilation
fix scala compilation

xuzhongxing/deeplearning4j,crockpotveggies/deeplearning4j,xuzhongxing/deeplearning4j,crockpotveggies/deeplearning4j,xuzhongxing/deeplearning4j,crockpotveggies/deeplearning4j,xuzhongxing/deeplearning4j,crockpotveggies/deeplearning4j,crockpotveggies/deeplearning4j,xuzhongxing/deeplearning4j,xuzhongxing/deeplearning4j,crockpotveggies/deeplearning4j