[gnome-shell-sass] panel-corner: Fix typo preventing unlock-screen style from working

[Rui Matos <rtcm src gnome org>]

commit b890a4003e711a4094a84c3ef8367e3f6417bcd4
Author: Rui Matos <tiagomatos gmail com>
Date:   Mon Mar 30 15:21:24 2015 +0200

    panel-corner: Fix typo preventing unlock-screen style from working

 _common.scss |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/_common.scss b/_common.scss
index 5bd588e..691cf2b 100644
--- a/_common.scss
+++ b/_common.scss
@@ -652,7 +652,7 @@ StScrollBar {
       -panel-corner-border-color: lighten($selected_bg_color,5%);
     }
 
-    &.lock-screen, &.login-screen, &unlock-screen {
+    &.lock-screen, &.login-screen, &.unlock-screen {
       -panel-corner-radius: 0;
       -panel-corner-background-color: transparent;
       -panel-corner-border-color: transparent;