[gtk+] color scale: Really sync style classes with GtkScale

[Lapo Calamandrei <lapo src gnome org>]

commit cca2a22b637e3bb42e793563a64c9e720077ab00
Author: Lapo Calamandrei <calamandrei gmail com>
Date:   Thu May 19 17:24:51 2016 +0200

    color scale: Really sync style classes with GtkScale
    
    sync the alpha scale styleclass too.

 gtk/ui/gtkcoloreditor.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/ui/gtkcoloreditor.ui b/gtk/ui/gtkcoloreditor.ui
index 76fcb6e..f0d7b8e 100644
--- a/gtk/ui/gtkcoloreditor.ui
+++ b/gtk/ui/gtkcoloreditor.ui
@@ -97,7 +97,7 @@
                 <property name="scale-type">1</property>
                 <property name="has-origin">False</property>
                 <style>
-                  <class name="scale-has-marks-above"/>
+                  <class name="marks-before"/>
                 </style>
                 <signal name="popup-menu" handler="popup_edit" swapped="no"/>
               </object>