Allow delivery of unnamed files in WNE.

skyscraper8/ReutersWne/WneStory.cs

@@ -141,9 +141,16 @@ struct WneStoryProgress
         this.SessionId = source.SessionId;
 		this.FileSize = source.FileSize;
         this.FileCaught = source.CaughtPayloadBytes;
+        if (!string.IsNullOrEmpty(this.Filename))
+        {
             if (this.Filename.StartsWith("\\"))
                 this.Filename = this.Filename.Substring(1);
         }
+        else
+        {
+            this.Filename = String.Format("skyscraper8_wne_{0}.bin", SessionId);
+        }
+    }
 
 	public string Filename { get; }
 	public uint SessionId { get; }