Hotfix for TA grade distribution graph when assignment has no criteria
Hotfix for TA grade distribution graph when assignment has no criteria

MarkUsProject/Markus,MarkUsProject/Markus,MarkUsProject/Markus,benjaminvialle/Markus,MarkUsProject/Markus,benjaminvialle/Markus,MarkUsProject/Markus,benjaminvialle/Markus,benjaminvialle/Markus,benjaminvialle/Markus,MarkUsProject/Markus,MarkUsProject/Markus,benjaminvialle/Markus,benjaminvialle/Markus,MarkUsProject/Markus