default of sieve() changed

This line, and those below, will be ignored--

M    R/tile.R
M    inst/NEWS.Rd
M    man/tile.Rd


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/vcd@756 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
new release



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/vcd@757 edb9625f-4e0d-4859-8d74-9fd3b1da38cb