[evolution-activesync] Fix build with libxml2 >= 2.9.0

[David Woodhouse <dwmw2 src gnome org>]

commit bba710d9ba3d5eceb9cbb6fea80e9803f215fd14
Author: David Woodhouse <David Woodhouse intel com>
Date:   Wed May 8 13:57:44 2013 +0100

    Fix build with libxml2 >= 2.9.0
    
    https://mail.gnome.org/archives/xml/2012-August/msg00005.html

 eas-daemon/libeas/eas-connection.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/eas-daemon/libeas/eas-connection.c b/eas-daemon/libeas/eas-connection.c
index 1d52b08..4e6c8fb 100644
--- a/eas-daemon/libeas/eas-connection.c
+++ b/eas-daemon/libeas/eas-connection.c
@@ -1658,8 +1658,13 @@ autodiscover_as_soup_msg (gchar *url, xmlOutputBuffer *buf)
        soup_message_set_request (msg,
                                  "text/xml",
                                  SOUP_MEMORY_COPY,
+#ifdef LIBXML2_NEW_BUFFER
+                                 (gchar *) xmlOutputBufferGetContent(buf),
+                                 xmlOutputBufferGetSize(buf));
+#else
                                  (gchar*) buf->buffer->content,
                                  buf->buffer->use);
+#endif
 
        g_debug ("autodiscover_as_soup_msg--");
        return msg;