Fix, programming language selected when previous programming language isn't define for new exercise
Fix, programming language selected when previous programming language isn't define for new exercise

BuggleInc/webPLM,polux/webPLM,MatthieuNICOLAS/webPLM,BuggleInc/webPLM,polux/webPLM,MatthieuNICOLAS/webPLM,MatthieuNICOLAS/webPLM,BuggleInc/webPLM,BuggleInc/webPLM,polux/webPLM,polux/webPLM,BuggleInc/webPLM,polux/webPLM,MatthieuNICOLAS/webPLM