Merge pull request #155 from primaryobjects/master

Fixed Shortlink from throwing exception if Comment.Parent is null.

Author: ddevault

RedditSharp/Things/Comment.cs

@@ -122,10 +122,17 @@ public override string Shortlink
         {
             get
             {
-                // Not really a "short" link, but you can't actually use short links for comments
+                // Not really a "short" link, but you can't actually use short links for comments
+                string linkId = "";
+                int index = this.LinkId.IndexOf('_');
+                if (index > -1)
+                {
+                    linkId = this.LinkId.Substring(index + 1);
+                }
+
                 return String.Format("{0}://{1}/r/{2}/comments/{3}/_/{4}",
-                                     RedditSharp.WebAgent.Protocol, RedditSharp.WebAgent.RootDomain,
-                                     this.Subreddit, this.Parent.Id, this.Id);
+                                     RedditSharp.WebAgent.Protocol, RedditSharp.WebAgent.RootDomain,
+                                     this.Subreddit, this.Parent != null ? this.Parent.Id : linkId, this.Id);
             }
         }