sftp: Fix memory leak in sftp_fstat

When parsing the result of a successful fstat call, make sure to free
the resulting reply message.

Signed-off-by: Pino Toscano <ptoscano@redhat.com>
Reviewed-by: Andreas Schneider <asn@samba.org>

src/sftp.c

@@ -3189,7 +3189,10 @@ sftp_attributes sftp_fstat(sftp_file file) {
   }
 
   if (msg->packet_type == SSH_FXP_ATTRS){
-    return sftp_parse_attr(file->sftp, msg->payload, 0);
+    sftp_attributes attr = sftp_parse_attr(file->sftp, msg->payload, 0);
+    sftp_message_free(msg);
+
+    return attr;
   } else if (msg->packet_type == SSH_FXP_STATUS) {
     status = parse_status_msg(msg);
     sftp_message_free(msg);