Media fallback

gistfile1.cs

		public static string GetOptionalMediaUrl(this INode node, string propertyAlias)
		{
			int? mediaId = node.GetOptionalNullableValue<int>(propertyAlias);
			if (mediaId.HasValue)
			{
				XPathNodeIterator media = library.GetMedia(mediaId.Value, false);
				//we look at both //Image and //node, because some media items may not have been saved since the schema changed.
				var file = media.Current.SelectSingleNode("//Image/umbracoFile | //node/data[@alias='umbracoFile']");
				if (file != null)
					return file.InnerXml;
			}
			return string.Empty;
		}