[balsa] send.c: Fix the build

[Peter Bloomfield <peterb src gnome org>]

commit b6e1265fceeba1019fde808d097cb1667de6a940
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Mon Jul 22 09:55:35 2019 -0400

    send.c: Fix the build
    
    * libbalsa/send.c (libbalsa_message_create_mime_message):
      LibBalsaIdentity *identity is used only in an autocrypt build.

 ChangeLog       | 7 +++++++
 libbalsa/send.c | 2 ++
 2 files changed, 9 insertions(+)
---
diff --git a/ChangeLog b/ChangeLog
index 630a96816..7b98c618a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2019-07-22  Peter Bloomfield  <pbloomfield bellsouth net>
+
+       send.c: Fix the build
+
+       * libbalsa/send.c (libbalsa_message_create_mime_message):
+       LibBalsaIdentity *identity is used only in an autocrypt build.
+
 2019-07-21  Peter Bloomfield  <pbloomfield bellsouth net>
 
        balsa-index: Add a convenience function
diff --git a/libbalsa/send.c b/libbalsa/send.c
index 422b01d17..a3e96a8ef 100644
--- a/libbalsa/send.c
+++ b/libbalsa/send.c
@@ -1229,7 +1229,9 @@ libbalsa_message_create_mime_message(LibBalsaMessage *message,
     GList *list;
     gboolean attach_pubkey = FALSE;
     GtkWindow *parent = g_object_get_data(G_OBJECT(message), "parent-window");
+#ifdef ENABLE_AUTOCRYPT
     LibBalsaIdentity *identity;
+#endif /* ENABLE_AUTOCRYPT */
 
     /* attach the public key only if we send the message, not if we just postpone it */
     if (!postponing &&