Unreviewed build fix. Fixed warning caused by r143305.

* bindings/scripts/CodeGeneratorJS.pm:
(GenerateParametersCheck):
* bindings/scripts/CodeGeneratorV8.pm:
(GenerateParametersCheck):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143308 268f45cc-cd09-0410-ab3c-d52691b4dbfc