* Remove a bug I created in r5171 where taking an object would terminate the client session

* change code to use an explicit state variable instead of using SOG.Name = null to signal deletion

OpenSim/Region/Environment/Scenes/EntityBase.cs

@@ -63,6 +63,15 @@ namespace OpenSim.Region.Environment.Scenes
             get { return m_name; }
             set { m_name = value; }
         }
+                
+        /// <summary>
+        /// Signals whether this group was in a scene but has since been deleted from it.
+        /// </summary>
+        public bool IsDeleted
+        {
+            get { return m_isDeleted; }
+        }
+        protected bool m_isDeleted;        
 
         protected LLVector3 m_pos;