[gtk+/gtk-style-context] Copy GtkWidgetPaths correctly

[Matthias Clasen <matthiasc src gnome org>]

commit 7c97d5e61dfe8e6e26ea891a732a5b5d0a32891f
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Nov 18 23:35:00 2010 -0500

    Copy GtkWidgetPaths correctly
    
    The code was forgetting to copy class information.

 gtk/gtkwidgetpath.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwidgetpath.c b/gtk/gtkwidgetpath.c
index dfd2afe..88d2b6d 100644
--- a/gtk/gtkwidgetpath.c
+++ b/gtk/gtkwidgetpath.c
@@ -160,6 +160,12 @@ gtk_widget_path_copy (const GtkWidgetPath *path)
             g_hash_table_insert (new.regions, key, value);
         }
 
+      if (elem->classes)
+        {
+          new.classes = g_array_new (FALSE, FALSE, sizeof (GQuark));
+          g_array_append_vals (new.classes, elem->classes->data, elem->classes->len);
+        }
+
       g_array_append_val (new_path->elems, new);
     }