fix bug for save binary for non-filename dataset
fix bug for save binary for non-filename dataset
olofer/LightGBM,henry0312/LightGBM,Allardvm/LightGBM,huanzhang12/LightGBM,microsoft/LightGBM,olofer/LightGBM,huanzhang12/lightgbm-gpu,microsoft/LightGBM,huanzhang12/LightGBM,wxchan/LightGBM,wxchan/LightGBM,huanzhang12/lightgbm-gpu,huanzhang12/lightgbm-gpu,henry0312/LightGBM,microsoft/LightGBM,Laurae2/LightGBM,Laurae2/LightGBM,cbecker/LightGBM,fstonezst/LightGBM,olofer/LightGBM,cbecker/LightGBM,Allardvm/LightGBM,Allardvm/LightGBM,cbecker/LightGBM,henry0312/LightGBM,huanzhang12/LightGBM,huanzhang12/lightgbm-gpu,henry0312/LightGBM,fstonezst/LightGBM,sightmachine/LightGBM,Allardvm/LightGBM,wxchan/LightGBM,wxchan/LightGBM,fstonezst/LightGBM,olofer/LightGBM,olofer/LightGBM,sightmachine/LightGBM,Laurae2/LightGBM,huanzhang12/LightGBM,sightmachine/LightGBM,fstonezst/LightGBM,huanzhang12/LightGBM,Laurae2/LightGBM,microsoft/LightGBM,henry0312/LightGBM,cbecker/LightGBM,sightmachine/LightGBM,microsoft/LightGBM,wxchan/LightGBM,fstonezst/LightGBM,huanzhang12/lightgbm-gpu,Laurae2/LightGBM,Allardvm/LightGBM