[Plugin: SuperSlider-Image] RSS Feeds: "Missing Attachment" error

FYI, to fix the “Missing Attachment” error that appears when viewing the RSS feeds for my blog, I edited the following code in superslider-image.php:

// this is for a feed call
		if ( is_feed() ) {
			$output = "\n";
			foreach ( $all_attachments as $attachment )
				$output .= wp_get_attachment_image($attachment->ID, 'large') . "\n";
			return $output;
		}

http://ww.wp.xz.cn/extend/plugins/superslider-image/