[gimp] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 163d46682d15820a32de469eae1d1e22e614f389
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Jun 20 16:59:42 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 1dd6dc7..b4d0d53 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -255,6 +255,7 @@ app/display/gimpdisplayshell-title.c
 app/display/gimpnavigationeditor.c
 app/display/gimpstatusbar.c
 app/display/gimptoolcompass.c
+app/display/gimptoolhandlegrid.c
 app/display/gimptooltransformgrid.c
 
 app/file/file-open.c