i know this is just a re based change for the r branch  so ignore the following comment if you prefer to keep the patch similar to the one we use for the tot i have changed my mind  it makes sense to just make this a static const member local to the sanitize function since that is the only place which uses it  you could make this static to this file too but given the large number of these constants  i prefer that they were defined in the methods which inturn use them 