Merged in bookmarked-top-level-program-subjects-not-returned (pull request auth0#24)

course_id set to integer before program query

Author: David Lenton

models/program.js

@@ -879,6 +879,8 @@ class Program {
     // Default to published subjects
     options.status_id =
       typeof options.status_id !== 'undefined' ? options.status_id : 3;
+    options.course_id =
+      typeof options.course_id !== 'undefined' ? parseInt(options.course_id) : null;
     // let query = 'SELECT `clcdc`.`subject`.`id` AS `id`, \
     // `clcdc`.`subject`.`title` AS `title`, \
     // `clcdc`.`subject`.`intro` AS `intro`, \
@@ -1067,8 +1069,10 @@ class Program {
         params.push(options.course_id);
       }
     } else {
-      if (parseInt(options.course_id) !== 0)
-        query += 'AND `clcdc`.`module_subject`.`course_id` is null ';
+      if (!isNaN(options.course_id)) {
+        if (parseInt(options.course_id) !== 0)
+          query += 'AND `clcdc`.`module_subject`.`course_id` is null ';
+      }
     }
     if (options.appId) {
       query +=