widget: ensure boolean before comparing

Ensure boolean value like done elsewhere.

diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 1efc66897d31b14b85fe9b95d28e78f679311a88..f969d477f3d29b1ee61e9dc9c7e51a7762a03f80 100644 (file)
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -6146,6 +6146,8 @@ gtk_widget_set_double_buffered (GtkWidget *widget,
 {
   g_return_if_fail (GTK_IS_WIDGET (widget));
 
+  double_buffered = (double_buffered != FALSE);
+
   if (double_buffered != gtk_widget_get_double_buffered (widget))
     {
       if (double_buffered)