add suitably-aligned R_allocLD

git-svn-id: https://svn.r-project.org/R/trunk@66898 00db46b3-68df-0310-9c12-caf00c1e9a41
work-around for PR16042

git-svn-id: https://svn.r-project.org/R/trunk@66900 00db46b3-68df-0310-9c12-caf00c1e9a41
SU added a workaround for Yosemite 'feature'

git-svn-id: https://svn.r-project.org/R/trunk@66902 00db46b3-68df-0310-9c12-caf00c1e9a41
update DISPLAY auto-launch detection for latest Xquartz

git-svn-id: https://svn.r-project.org/R/trunk@66904 00db46b3-68df-0310-9c12-caf00c1e9a41
typo

git-svn-id: https://svn.r-project.org/R/trunk@66907 00db46b3-68df-0310-9c12-caf00c1e9a41