php/php-src — pull request #924 by redfoxli (2014-11-26 08:24:17+00:00)
Title: Fix bug #67704: CURLOPT_POSTFIELDS modify the type of param

curl_setopt will modify the type of param
the bugs is here: https://bugs.php.net/bug.php?id=67704

when the type of param is not string, we use a temp variable(current_tmp in the code)， then convert it to string, free the memory of the variable at last