[gtk+] Remove a redundant check

[Matthias Clasen <matthiasc src gnome org>]

commit 5cd5db1f5758427a5412802f0b21eb1cdf370b26
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun May 11 11:56:22 2014 -0400

    Remove a redundant check
    
    gtk_widget_show/_hide already check the widget's visibility.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=728135

 gtk/gtkwidget.c |   11 ++++-------
 1 files changed, 4 insertions(+), 7 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 6d27c3f..b876509 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -8440,13 +8440,10 @@ gtk_widget_set_visible (GtkWidget *widget,
 {
   g_return_if_fail (GTK_IS_WIDGET (widget));
 
-  if (visible != gtk_widget_get_visible (widget))
-    {
-      if (visible)
-        gtk_widget_show (widget);
-      else
-        gtk_widget_hide (widget);
-    }
+  if (visible)
+    gtk_widget_show (widget);
+  else
+    gtk_widget_hide (widget);
 }
 
 void