Fix compilation warning: cast to GCompareFunc

diff --git a/gtk/gtkscale.c b/gtk/gtkscale.c
index 4c3f478506e66201dc59584375de2dcc49ebe4de..a69e05375f99bdfea21ffe38f47e0358e295bafc 100644 (file)
--- a/gtk/gtkscale.c
+++ b/gtk/gtkscale.c
@@ -1426,7 +1426,8 @@ gtk_scale_add_mark (GtkScale        *scale,
   mark->markup = g_strdup (markup);
   mark->position = position;
  
-  priv->marks = g_slist_insert_sorted (priv->marks, mark, compare_marks);
+  priv->marks = g_slist_insert_sorted (priv->marks, mark,
+                                       (GCompareFunc) compare_marks);
 
   n = g_slist_length (priv->marks);
   values = g_new (gdouble, n);