[balsa] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 56b64ba3391b561b14df875b577c070631cfd8e1
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Apr 8 14:59:40 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 f086ef1f7..949fb8001 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -18,6 +18,7 @@ libbalsa/filter.c
 libbalsa/filter-error.c
 libbalsa/filter-file.c
 libbalsa/filter-funcs.c
+libbalsa/folder-scanners.c
 libbalsa/gmime-application-pkcs7.c
 libbalsa/gmime-gpgme-signature.c
 libbalsa/gmime-multipart-crypt.c