
Some tests were constructing it with 0, so use -1 as the invalid state instead. Reviewers: Marshall Clow Differential Revision: http://reviews.llvm.org/D4095 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@215301 91177308-0d34-0410-b5e6-96231b3b80d8