I think width setting was automatic

if ($num_products_count > 0) {
if ($num_products_count < SHOW_PRODUCT_INFO_COLUMNS_NEW_PRODUCTS || SHOW_PRODUCT_INFO_COLUMNS_NEW_PRODUCTS == 0 ) {
$col_width = floor(100/$num_products_count);
} else {
$col_width = floor(100/SHOW_PRODUCT_INFO_COLUMNS_NEW_PRODUCTS);