[libsoup/wip/nacho/soup-extern] Mark soup_message_io_cleanup as available

[Ignacio Casal Quinteiro <icq src gnome org>]

commit e1d4d69ab0583f66d72919ad8d43ebc9d1d59c21
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Thu Oct 29 16:15:11 2015 +0100

    Mark soup_message_io_cleanup as available
    
    Even if it is private it was exported before
    so we need to keep it that way.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=757146

 libsoup/soup-message-private.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libsoup/soup-message-private.h b/libsoup/soup-message-private.h
index a9457bc..d043154 100644
--- a/libsoup/soup-message-private.h
+++ b/libsoup/soup-message-private.h
@@ -106,6 +106,7 @@ SoupAuth      *soup_message_get_proxy_auth (SoupMessage *msg);
 /* I/O */
 void       soup_message_io_stop        (SoupMessage *msg);
 void       soup_message_io_finished    (SoupMessage *msg);
+SOUP_AVAILABLE_IN_2_4
 void       soup_message_io_cleanup     (SoupMessage *msg);
 void       soup_message_io_pause       (SoupMessage *msg);
 void       soup_message_io_unpause     (SoupMessage *msg);