[gtk/wip/baedert/for-master: 38/39] label: Ignore setting attrs from NULL to NULL

[Timm Bäder <baedert src gnome org>]

commit aad67743b9eec9b09c1dd719926b422ac7c1d93f
Author: Timm Bäder <mail baedert org>
Date:   Fri Apr 17 07:37:22 2020 +0200

    label: Ignore setting attrs from NULL to NULL

 gtk/gtklabel.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/gtk/gtklabel.c b/gtk/gtklabel.c
index a2ffff86ac..33d5d7cc2b 100644
--- a/gtk/gtklabel.c
+++ b/gtk/gtklabel.c
@@ -1793,6 +1793,11 @@ gtk_label_set_attributes (GtkLabel         *self,
 {
   g_return_if_fail (GTK_IS_LABEL (self));
 
+  if (!attrs && !self->attrs)
+    return;
+
+  if (attrs == self->attrs) g_error ("Z");
+
   if (attrs)
     pango_attr_list_ref (attrs);