chahge_var_idx   1975 apps/traincascade/old_ml.hpp     void chahge_var_idx( int vi, bool state ); // misspelled (saved for back compitability),
chahge_var_idx    376 apps/traincascade/old_ml_data.cpp         chahge_var_idx( response_idx, true );
chahge_var_idx    378 apps/traincascade/old_ml_data.cpp         chahge_var_idx( idx, false );