[gnome-system-tools] Fix missing src/common/um-lockbutton.c in POTFILES.in

[Milan Bouchet-Valat <milanbv src gnome org>]

commit 440ad13fa8e9f77b5698be2b26c82011a90fb4ef
Author: Milan Bouchet-Valat <nalimilan club fr>
Date:   Sun Dec 19 21:52:24 2010 +0100

    Fix missing src/common/um-lockbutton.c in POTFILES.in

 po/POTFILES.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index a3ddd84..ebdf8ab 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -11,6 +11,7 @@ org.gnome.system-tools.gschema.xml.in
 src/common/gst-dialog.c
 src/common/gst-platform-dialog.c
 src/common/gst-tool.c
+src/common/um-lockbutton.c
 src/network/address-list.c
 src/network/callbacks.c
 src/network/connection.c