Fix warning.
Fix warning.


minhpqn/mlpack,minhpqn/mlpack,lezorich/mlpack,ajjl/mlpack,ranjan1990/mlpack,darcyliu/mlpack,ajjl/mlpack,darcyliu/mlpack,chenmoshushi/mlpack,ranjan1990/mlpack,bmswgnp/mlpack,Azizou/mlpack,ersanliqiao/mlpack,ajjl/mlpack,trungda/mlpack,erubboli/mlpack,datachand/mlpack,palashahuja/mlpack,BookChan/mlpack,ersanliqiao/mlpack,theranger/mlpack,thirdwing/mlpack,palashahuja/mlpack,ranjan1990/mlpack,theranger/mlpack,bmswgnp/mlpack,ersanliqiao/mlpack,lezorich/mlpack,stereomatchingkiss/mlpack,BookChan/mlpack,stereomatchingkiss/mlpack,thirdwing/mlpack,datachand/mlpack,Azizou/mlpack,erubboli/mlpack,datachand/mlpack,stereomatchingkiss/mlpack,trungda/mlpack,chenmoshushi/mlpack,BookChan/mlpack,palashahuja/mlpack,theranger/mlpack,Azizou/mlpack,lezorich/mlpack,minhpqn/mlpack,trungda/mlpack,erubboli/mlpack,bmswgnp/mlpack,thirdwing/mlpack,chenmoshushi/mlpack,darcyliu/mlpack