[gnome-shell] power: Fix typo

[Bastien Nocera <hadess src gnome org>]

commit 2659ba6bb4669abdfa2efe69c3ab2dfea7d0eac6
Author: Bastien Nocera <hadess hadess net>
Date:   Thu Oct 17 18:11:06 2013 +0200

    power: Fix typo
    
    JS ERROR: ReferenceError: this_proxy is not defined
    Indicator<._getStatus@/usr/share/gnome-shell/js/ui/status/power.js:66

 js/ui/status/power.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/status/power.js b/js/ui/status/power.js
index eda8c01..69a8d20 100644
--- a/js/ui/status/power.js
+++ b/js/ui/status/power.js
@@ -63,7 +63,7 @@ const Indicator = new Lang.Class({
             return _("Fully Charged");
         else if (this._proxy.State == UPower.DeviceState.CHARGING)
             seconds = this._proxy.TimeToFull;
-        else if (this_proxy.State == UPower.DeviceState.DISCHARGING)
+        else if (this._proxy.State == UPower.DeviceState.DISCHARGING)
             seconds = this._proxy.TimeToEmpty;
         // state is one of PENDING_CHARGING, PENDING_DISCHARGING
         else