Fix loading lists and namespaces

pkg/models/list.go

@@ -240,6 +240,9 @@ func (l *List) ReadOne(s *xorm.Session) (err error) {
 
 // GetListSimpleByID gets a list with only the basic items, aka no tasks or user objects. Returns an error if the list does not exist.
 func GetListSimpleByID(s *xorm.Session, listID int64) (list *List, err error) {
+
+	list = &List{}
+
 	if listID < 1 {
 		return nil, ErrListDoesNotExist{ID: listID}
 	}

pkg/models/list_duplicate_test.go

@@ -30,6 +30,7 @@ func TestListDuplicate(t *testing.T) {
 	db.LoadAndAssertFixtures(t)
 	files.InitTestFileFixtures(t)
 	s := db.NewSession()
+	defer s.Close()
 
 	u := &user.User{
 		ID: 1,
@@ -46,5 +47,4 @@ func TestListDuplicate(t *testing.T) {
 	assert.NoError(t, err)
 	// To make this test 100% useful, it would need to assert a lot more stuff, but it is good enough for now.
 	// Also, we're lacking utility functions to do all needed assertions.
-	_ = s.Close()
 }

pkg/models/namespace.go

@@ -109,6 +109,8 @@ func getNamespaceSimpleByID(s *xorm.Session, id int64) (namespace *Namespace, er
 		return &FavoritesPseudoNamespace, nil
 	}
 
+	namespace = &Namespace{}
+
 	exists, err := s.Where("id = ?", id).Get(namespace)
 	if err != nil {
 		return