Fix compilation warning: return FALSE instead NULL

diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 98a58df15231ed46737c1b88e8c04a8cb9d68028..322ef877f36aae2f74fe3d588c3bb17391877291 100644 (file)
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -6010,7 +6010,7 @@ 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;
 }