corrections

git-svn-id: https://svn.r-project.org/R/trunk@67074 00db46b3-68df-0310-9c12-caf00c1e9a41
fix ASAN overrun seen for package Ecfun

git-svn-id: https://svn.r-project.org/R/trunk@67076 00db46b3-68df-0310-9c12-caf00c1e9a41