[gnome-control-center] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit f8cae858d9733d629b89c5db13371565870d5569
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Nov 12 15:58:17 2018 +0100

    Update POTFILES.in

 po/POTFILES.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index f21d51032..fa9ab56d4 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -228,6 +228,7 @@ panels/wacom/wacom-stylus-page.ui
 shell/appdata/gnome-control-center.appdata.xml.in
 shell/cc-application.c
 shell/cc-panel-list.ui
+shell/cc-panel-loader.c
 shell/cc-window.c
 shell/cc-window.ui
 shell/gnome-control-center.desktop.in.in