[gtk+] Don't allocate space for "" in scale marks

[Matthias Clasen <matthiasc src gnome org>]

commit 519eae87296fecf4ee06e680f7abdeb8864ae427
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Aug 4 21:47:54 2010 -0400

    Don't allocate space for "" in scale marks
    
    Turns out GtkBuilder ends up creating marks with non-NULL
    empty texts, so ignore those. Bug 614443, reported by Filippo Argiolas.

 gtk/gtkscale.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkscale.c b/gtk/gtkscale.c
index c8a82cc..eb930ba 100644
--- a/gtk/gtkscale.c
+++ b/gtk/gtkscale.c
@@ -852,7 +852,7 @@ gtk_scale_get_mark_label_size (GtkScale        *scale,
     {
       GtkScaleMark *mark = m->data;
 
-      if (mark->markup)
+      if (mark->markup && *mark->markup)
         {
           pango_layout_set_markup (layout, mark->markup, -1);
           pango_layout_get_pixel_extents (layout, NULL, &logical_rect);