[gnome-panel] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 9b8a86fe8cceb755ff8569617f32442ed764218f
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Jan 6 01:35:17 2018 +0100

    Update POTFILES.in

 po/POTFILES.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index eae5a94..f081920 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -13,6 +13,7 @@ gnome-panel/applet.c
 gnome-panel/button-widget.c
 gnome-panel/gnome-desktop-item-edit.c
 gnome-panel/gnome-panel.desktop.in
+gnome-panel/gp-add-applet-window.c
 gnome-panel/gp-arrow-button.c
 gnome-panel/gp-properties-dialog.c
 gnome-panel/gp-properties-dialog.ui