widget: ensure boolean before comparing

Ensure boolean value like done elsewhere.

diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 953440eb3aa328249677916f2d732263275fa12f..0c67bfbb4a72ea6db2e4b96752a7eff7fdea8a79 100644 (file)
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -6131,6 +6131,8 @@ 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)