[gimp] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 1c6fb8330818f72a779893ffd1ede3492daa4038
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Mar 18 19:11:28 2019 +0100

    Update POTFILES.in

 po/POTFILES.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 572d0e3bfa..1d27258b2e 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -527,6 +527,7 @@ app/widgets/gimpcoloreditor.c
 app/widgets/gimpcolorframe.c
 app/widgets/gimpcolorhistory.c
 app/widgets/gimpcolormapeditor.c
+app/widgets/gimpcolormapselection.c
 app/widgets/gimpcolorselectorpalette.c
 app/widgets/gimpcontainerpopup.c
 app/widgets/gimpcontrollereditor.c