[gtk+] bbox: correct documentation typo

[Will Thompson <wjt src gnome org>]

commit 371a3a787176be03180f6bd2b1ffe093d53eef49
Author: Will Thompson <will willthompson co uk>
Date:   Sun Jun 23 15:35:21 2013 +0100

    bbox: correct documentation typo

 gtk/gtkbbox.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkbbox.c b/gtk/gtkbbox.c
index 17b35ed..260e1c7 100644
--- a/gtk/gtkbbox.c
+++ b/gtk/gtkbbox.c
@@ -1132,7 +1132,7 @@ gtk_button_box_size_allocate (GtkWidget     *widget,
 
 /**
  * gtk_button_box_new:
- * @orientation: the box' orientation.
+ * @orientation: the box's orientation.
  *
  * Creates a new #GtkButtonBox.
  *