[pitivi] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit f4c8d50721734a9c6bc6ea06197429d626ce423d
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Thu Oct 12 00:23:10 2017 +0200

    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 5b08e34..0af4c8e 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -8,6 +8,7 @@ data/pitivi.desktop.in
 [type: gettext/glade]data/ui/cliptransformation.ui
 [type: gettext/glade]data/ui/customwidgets/alpha.ui
 [type: gettext/glade]data/ui/customwidgets/frei0r-filter-3-point-color-balance.ui
+[type: gettext/glade]data/ui/customwidgets/frei0r-filter-alphaspot.ui
 [type: gettext/glade]data/ui/depsmanager.ui
 [type: gettext/glade]data/ui/effectslibrary.ui
 [type: gettext/glade]data/ui/elementsettingsdialog.ui