Fix compilation warning: return FALSE instead NULL

diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 31591c0f0517cee12ac6e615397e3a5ea4e8277c..2c8608191ffde7fad55df6d8e668be5d593d507e 100644 (file)
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -6025,7 +6025,7 @@ gtk_widget_set_realized (GtkWidget *widget,
 gboolean
 gtk_widget_get_mapped (GtkWidget *widget)
 {
-  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
+  g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
 
   return (GTK_WIDGET_FLAGS (widget) & GTK_MAPPED) != 0;
 }