Reid Kleckner 971c3ea67b Use nullptr instead of NULL for variadic sentinels ...

Windows defines NULL to 0, which when used as an argument to a variadic
function, is not a null pointer constant. As a result, Clang's
-Wsentinel fires on this code. Using '0' would be wrong on most 64-bit
platforms, but both MSVC and Clang make it work on Windows. Sidestep the
issue with nullptr.

llvm-svn: 221940

2014-11-13 22:55:19 +00:00

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