[gtk/gtk-3-24: 1/2] GtkHeaderBar: Don't leak decoration layout

[Matthias Clasen <matthiasc src gnome org>]

commit b1b9de6836a19cb6336b6a20ad652afc14f1e2b2
Author: Guido Günther <agx sigxcpu org>
Date:   Mon May 6 12:55:16 2019 +0200

    GtkHeaderBar: Don't leak decoration layout
    
    Currently we leak priv->decoration_layout if the layout is set
    multiple times.
    
    Signed-off-by: Guido Günther <agx sigxcpu org>

 gtk/gtkheaderbar.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkheaderbar.c b/gtk/gtkheaderbar.c
index 39e81b4079..dd7d2093c9 100644
--- a/gtk/gtkheaderbar.c
+++ b/gtk/gtkheaderbar.c
@@ -2370,6 +2370,7 @@ gtk_header_bar_set_decoration_layout (GtkHeaderBar *bar,
 
   priv = gtk_header_bar_get_instance_private (bar);
 
+  g_free (priv->decoration_layout);
   priv->decoration_layout = g_strdup (layout);
   priv->decoration_layout_set = (layout != NULL);