remove test presence from NullPresenceData since this appears to stop existing sessions with home locations from being picked up

only tested for a single user so this may still fail for multiple users
this may well be all academic anyway since standalone need to persistently store home location in presence data in some way

OpenSim/Data/MySQL/MySQLPresenceData.cs

@@ -122,7 +122,7 @@ namespace OpenSim.Data.MySQL
             cmd.CommandText = String.Format("select * from {0} where UserID=?UserID", m_Realm);
 
             cmd.Parameters.AddWithValue("?UserID", userID);
-;
+
             using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
             { 
                 dbcon.Open();
@@ -131,7 +131,6 @@ namespace OpenSim.Data.MySQL
 
                 using (IDataReader reader = cmd.ExecuteReader())
                 {
-
                     List<UUID> deleteSessions = new List<UUID>();
                     int online = 0;
 
@@ -143,6 +142,7 @@ namespace OpenSim.Data.MySQL
                             deleteSessions.Add(new UUID(reader["SessionID"].ToString()));
                     }
 
+                    // Leave one session behind so that we can pick up details such as home location
                     if (online == 0 && deleteSessions.Count > 0)
                         deleteSessions.RemoveAt(0);