window: Clear the renderer un unrealize

We disconnect from the GDK window, so the renderer can't keep any useful
state.

Plus, we might be using an entirely different window next time we
realize (after a call to gtk_window_set_display() for example) that should
use a completely different renderer anyway.

diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index c06b59df4d47a9cd34fa930be6bd00697e2c1af4..c9716a698b58951707455c69e80b5303b74dcb14 100644 (file)
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -6995,8 +6995,8 @@ gtk_window_unrealize (GtkWidget *widget)
                         (GtkCallback) gtk_widget_unrealize,
                         NULL);
 
-  if (priv->renderer != NULL)
-    gsk_renderer_unrealize (priv->renderer);
+  gsk_renderer_unrealize (priv->renderer);
+  g_clear_object (&priv->renderer);
 
   GTK_WIDGET_CLASS (gtk_window_parent_class)->unrealize (widget);