Sliced Invoices: Show quantity field as whole numbers only, no decimals

functions.php

add_filter( 'sliced_invoice_line_items_output', 'sliced_invoice_line_items_output_custom' );
function sliced_invoice_line_items_output_custom( $output ) {
	if ( preg_match_all('#<td class="qty">(.*?)</td>#', $output, $matches) ) {
		$patterns = array();
		$replacements = array();
		foreach ( $matches[1] as $match ) {
			$patterns[] = '#<td class="qty">'.$match.'</td>#';
			$replacements[] = '<td class="qty">'.intval($match).'</td>';
		}
		$output = preg_replace($patterns, $replacements, $output);
	}
	return $output;
}