update

git-svn-id: https://svn.r-project.org/R/trunk@66651 00db46b3-68df-0310-9c12-caf00c1e9a41
Workarond for sqrt(NA_real_) issue on Windows.


git-svn-id: https://svn.r-project.org/R/trunk@66653 00db46b3-68df-0310-9c12-caf00c1e9a41