Merging r155307:

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r155307 | void | 2012-04-22 00:23:04 -0700 (Sun, 22 Apr 2012) | 1 line

Remove some potential warnings about variables used uninitialized.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_31@155308 91177308-0d34-0410-b5e6-96231b3b80d8