2011-07-01  Oliver Hunt  <oliver@apple.com>

        IE Web Workers demo crashes in JSC::SlotVisitor::visitChildren()
        https://bugs.webkit.org/show_bug.cgi?id=63732

        Reviewed by Gavin Barraclough.

        Initialise the memory at the head of the new storage so that
        GC is safe if triggered by reportExtraMemoryCost.

        * runtime/JSArray.cpp:
        (JSC::JSArray::increaseVectorPrefixLength):

git-svn-id: svn://svn.chromium.org/blink/trunk@90282 bbb929c8-8fbe-4397-9dbb-9b2b20218538
    void set_greater(handle h, handle gh) { m_nodes[h].gt &= 0x80000000; m_nodes[h].gt |= gh; }

    void set_greater(handle h, handle gh) { m_nodes[h].gt &= 0x80000000; m_nodes[h].gt |= gh; }
