[balsa/popover: 6/10] body: Add a gpointer user_data member

[Peter Bloomfield <peterb src gnome org>]

commit c37b7e41f639ca98f2f1a3f09b22bb6ae89b2927
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Tue May 5 10:50:51 2020 -0400

    body: Add a gpointer user_data member
    
    for temporary storage of anything useful.

 libbalsa/body.h | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/libbalsa/body.h b/libbalsa/body.h
index 08098aa28..4f7e3b209 100644
--- a/libbalsa/body.h
+++ b/libbalsa/body.h
@@ -85,6 +85,8 @@ struct _LibBalsaMessageBody {
 
     LibBalsaMessageBody *next; /* Next part in the message */
     LibBalsaMessageBody *parts;        /* The parts of a multipart or message/rfc822 message */
+
+    gpointer user_data;         /* Place to temporarily hold other data */
 };
 
 LibBalsaMessageBody *libbalsa_message_body_new(LibBalsaMessage * message);