added a check that was vital for assignment submissions that do not require certain files
added a check that was vital for assignment submissions that do not require certain files

david-yz-liu/Markus,arkon/Markus,reidka/Markus,MarkUsProject/Markus,Lysette/Markus,benjaminvialle/Markus,binuri/Markus,arkon/Markus,reidka/Markus,reidka/Markus,jeremygoh/Markus,WilsonChiang/Markus,david-yz-liu/Markus,finnergizer/Markus,arkon/Markus,jeremygoh/Markus,finnergizer/Markus,finnergizer/Markus,wkwan/Markus,binuri/Markus,finnergizer/Markus,reidka/Markus,Lysette/Markus,MarkUsProject/Markus,jeremygoh/Markus,melneubert/Markus,david-yz-liu/Markus,arkon/Markus,MarkUsProject/Markus,ealonas/Markus,reidka/Markus,jeremygoh/Markus,MarkUsProject/Markus,ealonas/Markus,jeremygoh/Markus,arkon/Markus,ealonas/Markus,SoftwareDev/Markus,jeremygoh/Markus,Lysette/Markus,WilsonChiang/Markus,jeremygoh/Markus,Lysette/Markus,Lysette/Markus,wkwan/Markus,wkwan/Markus,david-yz-liu/Markus,melneubert/Markus,SoftwareDev/Markus,finnergizer/Markus,melneubert/Markus,MarkUsProject/Markus,wkwan/Markus,MarkUsProject/Markus,binuri/Markus,arkon/Markus,ealonas/Markus,finnergizer/Markus,david-yz-liu/Markus,jeremygoh/Markus,melneubert/Markus,ealonas/Markus,melneubert/Markus,binuri/Markus,WilsonChiang/Markus,reidka/Markus,binuri/Markus,WilsonChiang/Markus,WilsonChiang/Markus,benjaminvialle/Markus,benjaminvialle/Markus,wkwan/Markus,SoftwareDev/Markus,arkon/Markus,melneubert/Markus,benjaminvialle/Markus,ealonas/Markus,arkon/Markus,Lysette/Markus,ealonas/Markus,reidka/Markus,MarkUsProject/Markus,benjaminvialle/Markus,binuri/Markus,SoftwareDev/Markus,wkwan/Markus,SoftwareDev/Markus,WilsonChiang/Markus,reidka/Markus,benjaminvialle/Markus,finnergizer/Markus,ealonas/Markus,jeremygoh/Markus,MarkUsProject/Markus,WilsonChiang/Markus,melneubert/Markus,david-yz-liu/Markus,wkwan/Markus,ealonas/Markus,binuri/Markus,benjaminvialle/Markus,binuri/Markus,SoftwareDev/Markus,arkon/Markus,WilsonChiang/Markus,SoftwareDev/Markus,melneubert/Markus,david-yz-liu/Markus,david-yz-liu/Markus,binuri/Markus,melneubert/Markus,WilsonChiang/Markus,finnergizer/Markus,Lysette/Markus,wkwan/Markus,finnergizer/Markus,wkwan/Markus,reidka/Markus,david-yz-liu/Markus