[gtk+] Allow NULL as 'icon_widget' in gtk_tool_button_new()

[Javier Jardón <jjardon src gnome org>]

commit 1e2dabf31d6e4aeeb767f3f31f088b5e7f31e187
Author: Javier Jardón <jjardon gnome org>
Date:   Tue Apr 27 03:26:11 2010 +0200

    Allow NULL as 'icon_widget' in gtk_tool_button_new()
    
    This completes the patch of
    commit b8ec73a52fe3dc3012db78f45bfcafa2cb3e14ae

 gtk/gtktoolbutton.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtktoolbutton.c b/gtk/gtktoolbutton.c
index e8a6eca..4225401 100644
--- a/gtk/gtktoolbutton.c
+++ b/gtk/gtktoolbutton.c
@@ -943,7 +943,7 @@ gtk_tool_button_new (GtkWidget	 *icon_widget,
 {
   GtkToolButton *button;
 
-  g_return_val_if_fail (GTK_IS_MISC (icon_widget), NULL);
+  g_return_val_if_fail (icon_widget == NULL || GTK_IS_MISC (icon_widget), NULL);
 
   button = g_object_new (GTK_TYPE_TOOL_BUTTON,
                          "label", label,