[gnome-builder] dock-bin: set PANE_SEPARATOR class when rendering handles

[Christian Hergert <chergert src gnome org>]

commit 36f9ab27615f660b64553fabdac3e0d7f23b9258
Author: Christian Hergert <chergert redhat com>
Date:   Fri Apr 22 05:14:36 2016 -0700

    dock-bin: set PANE_SEPARATOR class when rendering handles

 contrib/pnl/pnl-dock-bin.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/contrib/pnl/pnl-dock-bin.c b/contrib/pnl/pnl-dock-bin.c
index 9e52168..16669d4 100644
--- a/contrib/pnl/pnl-dock-bin.c
+++ b/contrib/pnl/pnl-dock-bin.c
@@ -1414,6 +1414,8 @@ pnl_dock_bin_draw (GtkWidget *widget,
 
   style_context = gtk_widget_get_style_context (widget);
 
+  gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_PANE_SEPARATOR);
+
   for (i = 0; i < PNL_DOCK_BIN_CHILD_CENTER; i++)
     {
       PnlDockBinChild *child = &priv->children [i];
@@ -1469,6 +1471,8 @@ pnl_dock_bin_draw (GtkWidget *widget,
         }
     }
 
+  gtk_style_context_remove_class (style_context, GTK_STYLE_CLASS_PANE_SEPARATOR);
+
   return ret;
 }