[gimp] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 7d8976ad5b255d71dc03b5005f3ca4a083adb59a
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Mar 11 12:08:44 2017 +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 646c0e6..3cd327f 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -519,6 +519,7 @@ app/widgets/gimpgrideditor.c
 app/widgets/gimphelp.c
 app/widgets/gimphistogrameditor.c
 app/widgets/gimpiconpicker.c
+app/widgets/gimpiconsizescale.c
 app/widgets/gimpimagecommenteditor.c
 app/widgets/gimpimageprofileview.c
 app/widgets/gimpimagepropview.c