There was another uninitialized variable warning in the patch for https://bugs.webkit.org/show_bug.cgi?id=33416 which is causing build failures in Chromium in release mode.
Created attachment 50830 [details] Patch
Committed r56084: <http://trac.webkit.org/changeset/56084>
As a general rule you're allowed to land trivial build fixes without a review :D