functions.php fix

/**
 * Check WooCommerce existence
 *
 * @return  bool;
 */

function icy_add_to_cart_button() {
    global $product;



    sprintf('<a href="%s" rel="nofollow" data-product_id="%s" data-product_sku="%s" class="%s button product_type_%s"><i class="fa fa-shopping-cart"></i>%s</a>', esc_url( $link['url'] ), esc_attr( $product->id ), esc_attr( $product->get_sku() ), esc_attr( $link['class'] ), esc_attr( $product->product_type ), esc_html( $link['label'] ) );
}
add_filter('woocommerce_loop_add_to_cart_link', 'icy_add_to_cart_button');

function icy_woocommerce_enabled()
{
    if ( class_exists( 'woocommerce' ) ){ return true; }
    return false;
}
/*
function icy_login_msg( $message )
{
    return '<p class="message">For Buddypress:  user: bpdemo  pass: bpdemo100</p>';
}
add_filter( 'login_message', 'icy_login_msg' );
*/