[metacity] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 377daea6175fd63d87e91ace800ee5a186656cce
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Nov 28 18:25:22 2016 +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 22ab72b..57bf052 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -37,4 +37,5 @@ src/ui/menu.c
 src/ui/metaaccellabel.c
 src/ui/resizepopup.c
 src/ui/ui.c
+theme-viewer/theme-viewer-main.c
 theme-viewer/theme-viewer-window.c