[pengyi Peng(Yi)]

In xmlrpc-c, when timeout occurred, there are no messages in the queue, so, 
when it calls curl_multi_info_read to get privateCurlMsgP, curl_multi_info_read 
will return NULL. In this situation, xmlrpc fails to get resources and the 
memory won't be freed.

In normal situation, curl_multi_info_read will return te messages. Then, calls 
curl_easy_getinfo to retrieve information from a performed transfer. Finally 
xmlrpc-c calls the function curlTransaction_finish of its own to release the 
resources.

However, if timeout occurs, curl_multi_info_read return &easy->msg->extmsg 
which is NULL. Is there a function in curl like curl_multi_info_read which 
returns the easy->easy_handle directly? 

Like:
CURL *curl_multi_easy_handle_read(CURLM *multi_handle) {
  struct Curl_multi *multi=(struct Curl_multi *)multi_handle;

  if(GOOD_MULTI_HANDLE(multi)) {
    struct Curl_one_easy *easy;

    easy=multi->easy.next;

    if(!easy) {
      return NULL;
    }
    if(easy->msg_num) {
      easy->msg_num --;
      multi->num_msgs--;
    }

    return easy->easy_handle;
  }
  else
    return NULL;
}

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