Fixed json response for get_user_todolist.
Fixed json response for get_user_todolist.

polyfunc/flask-todolist,guillaumededrie/flask-todolist,rtzll/flask-todolist,polyfunc/flask-todolist,rtzll/flask-todolist,guillaumededrie/flask-todolist,poulp/flask-todolist,poulp/flask-todolist,poulp/flask-todolist,guillaumededrie/flask-todolist,rtzll/flask-todolist,0xfoo/flask-todolist,0xfoo/flask-todolist,0xfoo/flask-todolist,rtzll/flask-todolist,polyfunc/flask-todolist