Avoid using __SIZE_TYPE__ in a -std=c++98 -pedantic-errors test, because that
triggers an error on MS targets where __SIZE_TYPE__ expands to 'long long'.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184096 91177308-0d34-0410-b5e6-96231b3b80d8