[gtk+/gtk-3-12] Add a style class to model buttons

[Matthias Clasen <matthiasc src gnome org>]

commit f8aab7f3417161aec0bd2bd432b2685c46043afe
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Apr 22 11:09:46 2014 -0400

    Add a style class to model buttons
    
    This will let us stop using the class name in Adwaita, and will
    help with some future additions.

 gtk/gtkmodelbutton.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkmodelbutton.c b/gtk/gtkmodelbutton.c
index 0787e04..f0e6244 100644
--- a/gtk/gtkmodelbutton.c
+++ b/gtk/gtkmodelbutton.c
@@ -595,6 +595,7 @@ gtk_model_button_init (GtkModelButton *button)
   gtk_container_add (GTK_CONTAINER (button->box), button->image);
   gtk_container_add (GTK_CONTAINER (button->box), button->label);
   gtk_container_add (GTK_CONTAINER (button), button->box);
+  gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (button)), "modelbutton");
 }
 
 GtkWidget *