- Fixed db_string without default value

tcl/intranet-ganttproject-procs.tcl

@@ -2200,7 +2200,7 @@ ad_proc -public im_ganttproject_resource_component {
     @param user_name_link_opened List of users with details shown
 } {
     # Skip if this is a sub-project
-    set parent_id [db_string parent_id "select parent_id from im_projects where project_id = :project_id"]
+    set parent_id [db_string parent_id "select parent_id from im_projects where project_id = :project_id" -default ""]
     if {"" ne $parent_id} { return "" }