[gtk+/wip/attach-params-2: 9/13] 362625f37 gdkwindow: params must not be NULL

[William Hua <williamhua src gnome org>]

commit 941ef4892ae9200e0e5fa4f2a9d8d4e8992df3df
Author: William Hua <william hua canonical com>
Date:   Thu Feb 18 15:12:10 2016 -0500

    362625f37 gdkwindow: params must not be NULL

 gdk/gdkwindow.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 39c811d..2e44b28 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -11558,7 +11558,7 @@ gdk_window_show_window_menu (GdkWindow *window,
 /**
  * gdk_window_move_using_params:
  * @window: a #GdkWindow
- * @params: (nullable): information for positioning @window
+ * @params: (not nullable): information for positioning @window
  *
  * Moves @window to the best position according to @params. The best position
  * is decided by the backend.
@@ -11572,6 +11572,7 @@ gdk_window_move_using_params (GdkWindow       *window,
   GdkWindowImplClass *impl_class;
 
   g_return_if_fail (GDK_IS_WINDOW (window));
+  g_return_if_fail (GDK_IS_ATTACH_PARAMS (params));
 
   impl_class = GDK_WINDOW_IMPL_GET_CLASS (window->impl);