[gnome-control-center] Updated Polish translation

[Piotr Drąg <piotrdrag src gnome org>]

commit 3934214ecb37ea3caa61c5fa5a3f413ee8714917
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Wed Aug 21 02:57:09 2013 +0200

    Updated Polish translation

 po/pl.po |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/po/pl.po b/po/pl.po
index 04f4c74..1f7c966 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -40,7 +40,7 @@ msgstr "Zmienia się w ciągu dnia"
 
 #: ../panels/background/background.ui.h:4
 msgid "Lock Screen"
-msgstr "Ekran blokowania"
+msgstr "Ekran blokady"
 
 #: ../panels/background/background.ui.h:5
 msgctxt "background, style"