- Hide cctors for singletons

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@644 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/history.hh

@@ -89,6 +89,8 @@ namespace sgpem
 		
   protected:
 	History();			//private constructor.
+	History(const History&);
+	History& operator=(const History&);
 
   private:
 	int             _total_time_elapsed;

src/backend/policies_gatekeeper.hh

@@ -62,6 +62,8 @@ namespace sgpem
     
   private:
     PoliciesGatekeeper();	    //private constructor.
+    PoliciesGatekeeper(const PoliciesGatekeeper&);
+    PoliciesGatekeeper& operator=(const PoliciesGatekeeper&);
     
     // Deactivates active policies managed by the specified manager.
     void			    deactivate_policies(PolicyManager* manager);