This is about lattice not using rep() correctly. There is no '2.16' and
never will be (see the posting guide).
From the NEWS for R-devel:
\item The undocumented use \code{rep(NULL, length.out = n)} for
\code{n 0} (which returns \code{NULL}) now gives a warning.
Deepayan is aware
mylegend -
structure(list(bottom = structure(list(fun = draw.key, args =
structure(list(
key = structure(list(y = -0.2, x = 0.15, points = structure(list(
col = c(red, blue), pch = c(16, 17)), .Names = c(col,
pch)), text = structure(list(c(TREATMENT A (N=216), TREATMENT B
(N=431)
