Description:
------------
If a soap request timeout waiting http header, the program terminate abnormally.

I think the bug is the call of efree without checking if http_headers is not null in ext/soap/php_http.c , function http_connect about line 182:

  if (!get_http_headers(stream, &http_headers, &http_header_size TSRMLS_CC) || http_headers == NULL) {
    php_stream_close(stream);
    stream = NULL;
  }
  efree(http_headers);



Reproduce code:
---------------
  $dati = "test";
  $client = new SoapClient($wsdl);
  $res = $client->test($dati);

If the execution time of test method is more than default_socket_timeout seconds, the php interpret terminate with a dr watson stack trace.

Expected result:
----------------
A SoapException would be thrown ?

Certainly, the PHP script could be expected to continue rather than die.

Actual result:
--------------
PHP interpret (php.exe) dies with a dr watson stack trace.