Fix var override

quizz.js

@@ -492,8 +492,8 @@ QuizzBot.prototype.onMessageInternal = function(username, user, msg) {
 
             for (var questionId in questions) {
                 questionObj[questionId] = {};
-                for (var username in questions[questionId])
-                    questionObj[questionId][username] = new Date(questions[questionId][username]).toLocaleString();
+                for (var _username in questions[questionId])
+                    questionObj[questionId][_username] = new Date(questions[questionId][_username]).toLocaleString();
             }
             this.bot.sendNotice(username, JSON.stringify(questionObj));
         }