[gnome-software] trivial: Add px to the border-width value, to get rid of a warning

[Elad Alfassa <eladalfassa src gnome org>]

commit 90a942052a923c9e09e93eceae1dbcde7d73aca0
Author: Elad Alfassa <elad fedoraproject org>
Date:   Fri Sep 6 19:13:07 2013 +0300

    trivial: Add px to the border-width value, to get rid of a warning

 src/gtk-style.css |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gtk-style.css b/src/gtk-style.css
index d0b6e9e..c77ea12 100644
--- a/src/gtk-style.css
+++ b/src/gtk-style.css
@@ -58,7 +58,7 @@ GtkNotebook.main-notebook-software > GtkScrolledWindow {
 
 .view.tile {
         border-radius: 0;
-        border-width: 3;
+        border-width: 3px;
         border-image: url("shadow.png") 3 3 3 3 stretch;
         background-image: none;
         background-color: @list_box_bg;