[gimp] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit f0ff1adacc2942d7579e78e98530a261a7e6f753
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Apr 13 10:42:49 2019 +0200

    Update POTFILES.in

 po/POTFILES.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 1d27258b2e..aa10629a75 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -279,6 +279,7 @@ app/file/file-save.c
 app/file/file-utils.c
 
 app/file-data/file-data-gbr.c
+app/file-data/file-data-gex.c
 app/file-data/file-data-gih.c
 app/file-data/file-data-pat.c
 app/file-data/file-data.c