[libwnck] tasklist: Fix leaking PangoFontDescription

[Alberts Muktupāvels <muktupavels src gnome org>]

commit a2b1fb441d1cb002839b8817ade41f40abdb32e8
Author: Tomas Bzatek <tbzatek redhat com>
Date:   Wed Jul 29 17:28:33 2020 +0200

    tasklist: Fix leaking PangoFontDescription

 libwnck/tasklist.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/libwnck/tasklist.c b/libwnck/tasklist.c
index 2b20424e..955af013 100644
--- a/libwnck/tasklist.c
+++ b/libwnck/tasklist.c
@@ -1208,6 +1208,7 @@ wnck_tasklist_get_button_size (GtkWidget *widget)
                                        pango_context_get_language (context));
   char_width = pango_font_metrics_get_approximate_char_width (metrics);
   pango_font_metrics_unref (metrics);
+  pango_font_description_free (description);
   text_width = PANGO_PIXELS (TASKLIST_TEXT_MAX_WIDTH * char_width);
 
   width = text_width + 2 * TASKLIST_BUTTON_PADDING