Wrong status of failed test

if we don't have 'status' key in array we set '0' value, and '0' means 'The command executed successfully.'
http://code.google.com/p/selenium/wiki/JsonWireProtocol#Response_Status_Codes
Merge pull request #236 from emaks/patch-1

Wrong status of failed test
Merge branch 'master' of github.com:sebastianbergmann/phpunit-selenium