Fixes Mantis #3793 . Committing thomax/Snoopy's patch to allow deeding of objects, with changes:

- Set OwnerID = GroupID for deeded objects.
- Close a security loophole that would have allowed a user with deed rights in a group to deed ANY object to that group, even if it's not owned by them and/or not set to that group
- Set LastOwnerID correctly. Handle objects vs. prims correctly.

OpenSim/Data/MSSQL/MSSQLUserData.cs

@@ -1125,6 +1125,10 @@ ELSE
                 retval.ID = new UUID((Guid)reader["UUID"]);
                 retval.FirstName = (string)reader["username"];
                 retval.SurName = (string)reader["lastname"];
+                if (reader.IsDBNull(reader.GetOrdinal("email")))
+                    retval.Email = "";
+                else
+                    retval.Email = (string)reader["email"];
 
                 retval.PasswordHash = (string)reader["passwordHash"];
                 retval.PasswordSalt = (string)reader["passwordSalt"];