Merging r343369:

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r343369 | vitalybuka | 2018-09-28 19:17:12 -0700 (Fri, 28 Sep 2018) | 1 line

[cxx2a] Fix warning triggered by r343285
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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/branches/release_70@348453 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed