[gtk/matthiasc/for-master: 3/3] Fix treelistmodel tests

[Matthias Clasen <matthiasc src gnome org>]

commit acabdafb3554287fca83cb0439b6d27a2f68fc1e
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Dec 4 18:30:37 2019 -0500

    Fix treelistmodel tests
    
    They were failing to return a reference where they
    need to. This was uncovered by fixing an unrelated
    ref leak.

 testsuite/gtk/treelistmodel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/testsuite/gtk/treelistmodel.c b/testsuite/gtk/treelistmodel.c
index 3a0d6df674..75dbcd41fa 100644
--- a/testsuite/gtk/treelistmodel.c
+++ b/testsuite/gtk/treelistmodel.c
@@ -158,7 +158,7 @@ create_sub_model_cb (gpointer item,
                      gpointer unused)
 {
   if (G_IS_LIST_MODEL (item))
-    return item;
+    return g_object_ref (item);
 
   return NULL;
 }