Avoid divisions when doing Math.min(0, 0).
https://bugs.webkit.org/show_bug.cgi?id=26978 has been
filed to fix inconsistencies between JSC and V8.
Review URL: http://codereview.chromium.org/149188

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2367 ce2b1a6d-e550-0410-aec6-3dcde31c8c00