[balsa] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 5ef2edd52b80023a5abfab3f19264e48465102a4
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Mar 18 00:59:08 2018 +0100

    Update POTFILES.in

 po/POTFILES.in |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index d3f9f80..3245a84 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -32,6 +32,7 @@ libbalsa/libbalsa-gpgme-widgets.c
 libbalsa/libbalsa-progress.c
 libbalsa/libbalsa-vfs.c
 libbalsa/mailbox.c
+libbalsa/mailbox.h
 libbalsa/mailbox_imap.c
 libbalsa/mailbox_local.c
 libbalsa/mailbox_maildir.c
@@ -39,6 +40,7 @@ libbalsa/mailbox_mbox.c
 libbalsa/mailbox_mh.c
 libbalsa/mailbox_pop3.c
 libbalsa/message.c
+libbalsa/message.h
 libbalsa/misc.c
 libbalsa/rfc2445.c
 libbalsa/rfc3156.c