[Rd] src/library/grid/src/grid.c (PR#14199)

[A.R.Runnalls at kent.ac.uk]

At around line 2590, in function gridRect() in
src/library/grid/src/grid.c (at the latest svn revision, 50745), ought
not temp, www and hhh to be PROTECTed within this block?

Andrew