add missing comma in debugging code

diff --git a/lib/message.cc b/lib/message.cc
index b708c1810fd6682a7f9f3bd31207df4da7a69b23..03b8c812eeef3238a7b5e7affde23f7b53bf85d6 100644 (file)
--- a/lib/message.cc
+++ b/lib/message.cc
@@ -320,7 +320,7 @@ _notmuch_message_get_in_reply_to (notmuch_message_t *message)
     if (i != message->doc.termlist_end () &&
        strncmp ((*i).c_str (), prefix, prefix_len))
     {
-       INTERNAL_ERROR ("Message %s has duplicate In-Reply-To IDs: %s and %s\n"
+       INTERNAL_ERROR ("Message %s has duplicate In-Reply-To IDs: %s and %s\n",
                        notmuch_message_get_message_id (message),
                        message->in_reply_to,
                        (*i).c_str () + prefix_len);