override Media to make google adwords conv tracking work

Media.php

<?php

// Michael Hjulskov - added this to fix issue with Google Adwords conversion tracking code
// REMEMBER TO ADD  data-keepinline="true" to the order-confirmation.tpl to avoid javascript to get broken

Class Media extends MediaCore
{
	public static function deferScript($matches)
	{
		if (!is_array($matches))
			return false;
		$inline = '';

		if (isset($matches[0]))
			$original = trim($matches[0]);

		if (isset($matches[1]))
			$inline = trim($matches[1]);
		// prestarocket
		// This is an inline script, add its content to inline scripts stack then remove it from content
		if (!empty($inline) && preg_match('/<\s*script(?!.*data-keepinline)[^>]*>/ims', $original) !== 0 && Media::$inline_script[] = $inline)
			return '';
		//end prestarocket
		// This is an external script, if it already belongs to js_files then remove it from content
		preg_match('/src\s*=\s*["\']?([^"\']*)[^>]/ims', $original, $results);
		if (array_key_exists(1, $results))
		{
			if (substr($results[1], 0, 2) == '//')
			{
				$protocol_link = Tools::getCurrentUrlProtocolPrefix();
				$results[1] = $protocol_link.ltrim($results[1], '/');
			}
			if (in_array($results[1], Context::getContext()->controller->js_files) || in_array($results[1], Media::$inline_script_src))
				return '';
		}

		// return original string because no match was found
		return $original;
	}
}