Fix 0011923: incorrect display of access level in notes

Do not display the access level in bugnotes when it is 0 (ANYBODY).

Prior to this, the access level display in bugnotes was (@0@) if the
user who added the note did not have access to the project. This
situation can happen when an issue is moved to a private project, or
when a user's rights to a private project are revoked.

Signed-off-by: Damien Regad damien.regad@merckgroup.com