[R] make check and postscript output in R 1.7.1

[Don MacQueen]

I think this might be telling us that reg-plot.ps.save needs to be 
updated for the new version of postscript().

comparing 'reg-plot.ps' to '../../source/tests/reg-plot.ps.save' ...100c100
< 663.53 0 l
---
>  663.53 -0.00 l
104c104
< 0 -7.20 l
---
>  -0.00 -7.20 l

-Don
-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA