Use prefix ++ operator for non-primitive type to avoid keeping a copy of the previous value around

src/nsmd.cpp

@@ -598,7 +598,7 @@ number_of_reponsive_clients ( void )
      */
 
     int responsive = 0;
-    for ( std::list<Client*>::const_iterator i = client.begin(); i != client.end(); i++ )
+    for ( std::list<Client*>::const_iterator i = client.begin(); i != client.end(); ++i )
     {
         //Optimisation: Clients that never launched (e.g. file not found) will be checked many times/seconds here. We skip them by counting them
         if ( (*i)->active || (*i)->launch_error )