Problem with Video sitemap -- needs to be excluded

Sitemap links to three sitemaps -- The content, the images, and videos. However, there are no videos, but there is no way to turn off the generation of that link, and so the empty one that is generated is not completely valid, so Google Webmaster tools shows an error condition that I think is preventing it from spidering my site.

Please advise or help -- support access is turned on.

Thanks!