Follow-up to r75766 / <rdar://problem/5469576>.
Reviewed by Maciej Stachowiak. We were failing to initialize the key, causing all sorts of unexpected behavior. * wtf/FastMalloc.cpp: (WTF::setThreadHeap): (WTF::TCMalloc_ThreadCache::GetThreadHeap): (WTF::TCMalloc_ThreadCache::InitTSD): Ensure that the key is initialized. git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76214 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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