VECSUBSET, VECSUBASSIGN, and friends now try to handle VECSXP values efficiently.


git-svn-id: https://svn.r-project.org/R/trunk@66636 00db46b3-68df-0310-9c12-caf00c1e9a41
new R Foundation (and R core) - patch from Dirk -- rather now than wait too long for the automated solution

git-svn-id: https://svn.r-project.org/R/trunk@66638 00db46b3-68df-0310-9c12-caf00c1e9a41