In the file: /www/bboard/search-pls-subject.tcl

Add bboard_user_can_view_topic_p SQL function contained in
/www/bboard/contributions.tcl patch

After
  set_form_variables_string_trim_DoubleAposQQ
Add
  set user_id [ad_verify_and_get_user_id]

Remove
  set user_id [ad_get_user_id]

After 
  and topic_id = $topic_id
Add
  and bboard_user_can_view_topic_p($user_id, $topic_id) = 't'