[gegl] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit d8ca7ec72a475bdcbdffecdf984ab1e6b72d0749
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Nov 27 16:48:54 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 7ac2078..e1443af 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -4,6 +4,7 @@ bin/gegl.c
 bin/gegl-options.c
 gegl/gegl-enums.c
 gegl/gegl-init.c
+gegl/gegl-serialize.c
 gegl/module/geglmodule.c
 operations/common/alien-map.c
 operations/common/bilateral-filter.c