* Corrects decoding behaviour of Message classes that are abstract

* Corrects behaviour of displaying data sent to uploader capability in Inspector views
* Fixes unreferenced object exception in GridProxy when checking for uploader capabilities

git-svn-id: http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk@2967 52acb1d6-8a22-11de-b505-999d5b087335

OpenMetaverse/PacketDecoder.cs

@@ -878,7 +878,7 @@ namespace OpenMetaverse.Packets
             return String.Format("{0,30}: {1,-2} {2,-37} [ParcelCategory]",
                 fieldName,
                 fieldData,
-                "(" + (ParcelCategory)(uint)fieldData + ")");
+                "(" + fieldData + ")");
         }
 
         private static string DecodeObjectUpdateFlags(string fieldName, object fieldData)