Closed Issue: Exception thrown if AuthorUrls not defined for plug-in [7851]

1. Create plug-in.
2. Add AuthorUrl attribute but not AuthorUrls
3. Navigate to Admin/Plugins
 
Expected:
 
Author is hyperlinked with AuthorUrl
 
Actual:
 
Null reference exception is thrown in HtmlHelperExtensions:
 
return htmlHelper.LinkOrDefault(authors[0].CleanText(), authorUrls.Length == 1 ? authorUrls[0].CleanHref() : "");
 
Is AuthorUrl needed? Won't AuthorUrls just work?