[gtk+] docs: fix typo in property name

[William Jon McCann <mccann src gnome org>]

commit 0b4ea6ea1b3986a01226c1723164f8a7e3cda714
Author: William Jon McCann <william jon mccann gmail com>
Date:   Tue Jan 21 14:41:12 2014 -0500

    docs: fix typo in property name

 gtk/gtkbox.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkbox.c b/gtk/gtkbox.c
index 8b78622..08014b9 100644
--- a/gtk/gtkbox.c
+++ b/gtk/gtkbox.c
@@ -285,7 +285,7 @@ gtk_box_class_init (GtkBoxClass *class)
    * and #GtkWidget:vexpand properties are the preferred way to influence
    * child size allocation in containers.
    *
-   * In contrast to #GtkWidget::hexpand, the expand child property does
+   * In contrast to #GtkWidget:hexpand, the expand child property does
    * not cause the box to expand itself.
    */
   gtk_container_class_install_child_property (container_class,