magnifier: Don't try to use a null widget paintable

We destroy the paintable in dispose, which can be called multiple times.

diff --git a/gtk/gtkmagnifier.c b/gtk/gtkmagnifier.c
index 143e98827d5872a6fa9d6195fbc4d3478bca1185..049ea2e0824e2fde5a619deda312697256c609dc 100644 (file)
--- a/gtk/gtkmagnifier.c
+++ b/gtk/gtkmagnifier.c
@@ -158,7 +158,9 @@ gtk_magnifier_dispose (GObject *object)
   GtkMagnifier *self = GTK_MAGNIFIER (object);
   GtkMagnifierPrivate *priv = gtk_magnifier_get_instance_private (self);
 
-  _gtk_magnifier_set_inspected (self, NULL);
+  if (priv->paintable)
+    _gtk_magnifier_set_inspected (self, NULL);
+
   g_clear_object (&priv->paintable);
 
   G_OBJECT_CLASS (gtk_magnifier_parent_class)->dispose (object);