make sure we have a non null value for display_lc, bug #2618
make sure we have a non null value for display_lc, bug #2618

openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server