Bug 16719: (follow-up) Update check on password mapping

Change to allow for unmapped default passwords

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

C4/Auth_with_ldap.pm

@@ -392,7 +392,7 @@ sub update_local {
     );
 
     # MODIFY PASSWORD/LOGIN if password was mapped
-    _do_changepassword($userid, $borrowerid, $password) if $borrower->{'password'};
+    _do_changepassword($userid, $borrowerid, $password) if exists( $borrower->{'password'} );
 }
 
 1;