Fix errors when scorm data is undefined.
Fix errors when scorm data is undefined.

learningequality/kolibri,mrpau/kolibri,indirectlylit/kolibri,indirectlylit/kolibri,mrpau/kolibri,mrpau/kolibri,indirectlylit/kolibri,learningequality/kolibri,indirectlylit/kolibri,mrpau/kolibri,learningequality/kolibri,learningequality/kolibri