lwd patches for "contour"

[Paul Murrell]

hi


>   I found it useful to have contour be able to do line widths ... hope
> that the guts haven't changed an enormous amount in the current
> development version ...  the patches are relatively trivial, mostly going
> by analogy with lty and col (although in my ignorance it took me a while
> to figure out what UNPROTECT(2) was and why it should be changed to
> UNPROTECT(3) ...  hope this is useful.


thanks very much !  i have been making a couple of changes to contour and i
have added your patch.  it should be in the next release (0.99)

paul


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