minor shadow fix

src/io/page_dmatrix-inl.hpp

@@ -185,8 +185,8 @@ class DMatrixPageBase : public DataMatrix {
     iter_->Load(utils::FileStream(utils::FopenCheck(fname_row.c_str(), "rb")));    
     // save data matrix
     utils::FileStream fs(utils::FopenCheck(cache_file, "wb"));
-    int magic = kMagic;
-    fs.Write(&magic, sizeof(magic));
+    int tmagic = kMagic;
+    fs.Write(&tmagic, sizeof(tmagic));
     this->info.SaveBinary(fs);
     fs.Close();
     if (!silent) {

src/learner/learner-inl.hpp

@@ -235,9 +235,8 @@ class BoostLearner : public rabit::Serializable {
   /*!
    * \brief save model into file
    * \param fname file name
-   * \param save_base64 whether save in base64 format
    */
-  inline void SaveModel(const char *fname, bool save_base64 = false) const {
+  inline void SaveModel(const char *fname) const {
     utils::IStream *fo = utils::IStream::Create(fname, "w");
     if (save_base64 != 0 || !strcmp(fname, "stdout")) {
       fo->Write("bs64\t", 5);

src/tree/updater_colmaker-inl.hpp

@@ -237,7 +237,6 @@ class ColMaker: public IUpdater {
       bool need_forward = param.need_forward_search(fmat.GetColDensity(fid));
       bool need_backward = param.need_backward_search(fmat.GetColDensity(fid));
       const std::vector<int> &qexpand = qexpand_;
-      int nthread;
       #pragma omp parallel
       {
         const int tid = omp_get_thread_num();