builder: Add an assertion

This case is clearly not meant to happen.
Assert that it doesn't.

diff --git a/gtk/gtkbuilder.c b/gtk/gtkbuilder.c
index 6f56a196c5743fd51b9f934b00155e398629f77e..8a92d93fe46dab341a4f17c6de641d31c8dc7d31 100644 (file)
--- a/gtk/gtkbuilder.c
+++ b/gtk/gtkbuilder.c
@@ -1145,6 +1145,8 @@ gtk_builder_create_bindings (GtkBuilder  *builder,
 
           free_binding_expression_info (info);
         }
+      else
+        g_assert_not_reached ();
     }
 
   g_slist_free (priv->bindings);