Diff for making php-webdriver work on saucelabs

WebDriverBase.diff

diff --git a/PHPWebDriver/WebDriverBase.php b/PHPWebDriver/WebDriverBase.php
index 1f2bc78..c5f0708 100644
--- a/PHPWebDriver/WebDriverBase.php
+++ b/PHPWebDriver/WebDriverBase.php
@@ -144,6 +144,8 @@ abstract class PHPWebDriver_WebDriverBase {
       curl_setopt($curl, CURLOPT_POST, true);
       if ($params && is_array($params)) {
         curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($params));
+      } else {
+       curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-length: 0'));
       }
     } else if ($http_method == 'DELETE') {
       curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'DELETE');