+ two examples for r66734

git-svn-id: https://svn.r-project.org/R/trunk@66735 00db46b3-68df-0310-9c12-caf00c1e9a41
Added boundary checks to integer conversion when genrating random numbers from
discrete-valued distributions (PR#16016)


git-svn-id: https://svn.r-project.org/R/trunk@66736 00db46b3-68df-0310-9c12-caf00c1e9a41