Avoid a gratuitious KillObject storm on region crossing

OpenSim/Region/Environment/Scenes/SceneObjectGroup.cs

@@ -741,8 +741,11 @@ namespace OpenSim.Region.Environment.Scenes
                 // It then reappears on the avatar, deselected
                 // through the full update below
                 //
+                if (IsSelected)
+                {
                     foreach (SceneObjectPart part in m_parts.Values)
                         m_scene.SendKiPrimitive(part.LocalId);
+                }
 
                 IsSelected = false; // fudge....
                 ScheduleGroupForFullUpdate();