[gnome-shell-sass] Fix typo

[Florian Müllner <fmuellner src gnome org>]

commit 099f3d31813ce1f30c30c14f168a8af2e6cd4904
Author: Florian Müllner <fmuellner gnome org>
Date:   Mon Feb 23 12:54:10 2015 +0100

    Fix typo

 _common.scss |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/_common.scss b/_common.scss
index 3afe14f..122aa25 100644
--- a/_common.scss
+++ b/_common.scss
@@ -121,9 +121,9 @@ StScrollBar {
     height: 22px;
     background-image: url("resource:///org/gnome/shell/theme/checkbox-off.svg");
   }
-  &:focus Stbin { background-image: url("resource:///org/gnome/shell/theme/checkbox-off-focused.svg"); }
-  &:checked Stbin { background-image: url("resource:///org/gnome/shell/theme/checkbox.svg"); }
-  &:focus:checked Stbin { background-image: url("resource:///org/gnome/shell/theme/checkbox-focused.svg"); }
+  &:focus StBin { background-image: url("resource:///org/gnome/shell/theme/checkbox-off-focused.svg"); }
+  &:checked StBin { background-image: url("resource:///org/gnome/shell/theme/checkbox.svg"); }
+  &:focus:checked StBin { background-image: url("resource:///org/gnome/shell/theme/checkbox-focused.svg"); }
 }
 
 /* Switches */