path = g_list_nth_data(selected_dives, 0);
if (gtk_tree_model_get_iter(model, &iter, path)) {
gtk_tree_model_get_value(model, &iter, DIVE_INDEX, &value);
path = g_list_nth_data(selected_dives, 0);
if (gtk_tree_model_get_iter(model, &iter, path)) {
gtk_tree_model_get_value(model, &iter, DIVE_INDEX, &value);