Index: openacs-4/packages/bug-tracker/www/related-file-download.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/bug-tracker/www/related-file-download.tcl,v
diff -u -r1.1 -r1.2
--- openacs-4/packages/bug-tracker/www/related-file-download.tcl	30 May 2008 13:46:05 -0000	1.1
+++ openacs-4/packages/bug-tracker/www/related-file-download.tcl	14 Oct 2013 18:14:22 -0000	1.2
@@ -17,7 +17,7 @@
 }
 
 # make sure this object is related to this bug
-if {[exists_and_not_null revision_id]} {
+if {([info exists revision_id] && $revision_id ne "")} {
     if { ![db_0or1row get_related_revision {}] } {
         ad_return_complaint 1 [_ bug-tracker.Related_file_not_found]
         ad_script_abort