Swap two lines in __mutex_base. On systems with high clock rates, we could mistakenly return no_timeout when a mutex had timed out if we got a tick between these two lines.  Thanks to Brian Cain for the bug report.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291492 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed