[gtk: 1/2] Allow passing a `NULL` factory to `gtk_column_view_column_new()`

[Matthias Clasen <matthiasc src gnome org>]

commit 8245fd4beb5db4fc7ea2dc3b5b82890673ea81c2
Author: Sebastian Dröge <sebastian centricular com>
Date:   Tue Feb 8 16:25:28 2022 +0200

    Allow passing a `NULL` factory to `gtk_column_view_column_new()`

 gtk/gtkcolumnviewcolumn.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkcolumnviewcolumn.c b/gtk/gtkcolumnviewcolumn.c
index ad62b34eca..557b9debd4 100644
--- a/gtk/gtkcolumnviewcolumn.c
+++ b/gtk/gtkcolumnviewcolumn.c
@@ -379,7 +379,7 @@ gtk_column_view_column_new (const char         *title,
 {
   GtkColumnViewColumn *result;
 
-  g_return_val_if_fail (GTK_IS_LIST_ITEM_FACTORY (factory), NULL);
+  g_return_val_if_fail (factory == NULL || GTK_IS_LIST_ITEM_FACTORY (factory), NULL);
 
   result = g_object_new (GTK_TYPE_COLUMN_VIEW_COLUMN,
                          "factory", factory,