scale: don't add scale label for empty markup

This is a regression from the gadget port.

diff --git a/gtk/gtkscale.c b/gtk/gtkscale.c
index 33e519956635aad83178cedb1e0b606fe0df87e2..73c3f65c67bb2dc0adeb52b84c87fdad621fabcb 100644 (file)
--- a/gtk/gtkscale.c
+++ b/gtk/gtkscale.c
@@ -2018,7 +2018,7 @@ gtk_scale_add_mark (GtkScale        *scale,
                                NULL,
                                gtk_scale_render_mark_indicator,
                                mark, NULL);
-  if (mark->markup)
+  if (mark->markup && *mark->markup)
     mark->label_gadget =
       gtk_css_custom_gadget_new ("label",
                                  GTK_WIDGET (scale), mark->gadget,