[gnome-themes-standard] ContentView: fix checkbox in backdrop

[Jakub Steiner <jimmac src gnome org>]

commit 898bd6bfa48bbd98e806afacb3178ab90c900027
Author: Paolo Borelli <pborelli gnome org>
Date:   Wed Feb 20 14:10:17 2013 +0100

    ContentView: fix checkbox in backdrop

 themes/Adwaita/gtk-3.0/gtk-widgets.css |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/themes/Adwaita/gtk-3.0/gtk-widgets.css b/themes/Adwaita/gtk-3.0/gtk-widgets.css
index a4b1df3..c1c8cf7 100644
--- a/themes/Adwaita/gtk-3.0/gtk-widgets.css
+++ b/themes/Adwaita/gtk-3.0/gtk-widgets.css
@@ -3653,7 +3653,8 @@ GdMainIconView.content-view {
     -GdMainIconView-icon-size: 40;
 }
 
-GtkIconView.content-view.cell.check {
+GtkIconView.content-view.cell.check,
+GtkIconView.content-view.cell.check:backdrop {
     background-image: url("assets/grid-selection-unchecked.svg");
     background-color: transparent;
 }