set method here(r,c) to protected

SpMat.h

@@ -172,6 +172,7 @@ public:
 protected:
   const std::vector<unsigned int>& get_ri(unsigned int i) const;
   const std::vector<T>&            get_val(unsigned int i) const;
+  T& here(unsigned int r, unsigned int c);
 
 private:
   unsigned int                              _m;
@@ -181,8 +182,7 @@ private:
   std::vector<std::vector<T> >              _val;
   bool                                      _pw;   // Print Warnings
 
-  bool found(const std::vector<unsigned int>&  ri, unsigned int key, int& pos) const;
-  T& here(unsigned int r, unsigned int c);
+  bool found(const std::vector<unsigned int>&  ri, unsigned int key, int& pos) const;  
   void insert(std::vector<unsigned int>& vec, int indx, unsigned int val);
   void insert(std::vector<T>& vec, int indx, const T& val);
   bool same_sparsity(const SpMat<T>& M) const;