[gtk+] GtkModelButton: Add docs

[Matthias Clasen <matthiasc src gnome org>]

commit d0d41dfebaf4f381f0d6deffafecfe254b680983
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Nov 23 19:16:49 2014 -0500

    GtkModelButton: Add docs

 gtk/gtkmodelbutton.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkmodelbutton.c b/gtk/gtkmodelbutton.c
index 355a61c..2f3cfae 100644
--- a/gtk/gtkmodelbutton.c
+++ b/gtk/gtkmodelbutton.c
@@ -986,6 +986,15 @@ gtk_model_button_init (GtkModelButton *button)
                                GTK_STYLE_CLASS_MENUITEM);
 }
 
+/**
+ * gtk_model_button_new:
+ *
+ * Creates a new GtkModelButton.
+ *
+ * Returns: the newly created #GtkModelButton widget
+ *
+ * Since: 3.16
+ */
 GtkWidget *
 gtk_model_button_new (void)
 {