[Rd] pnorm conditional (PR#2883)

[dbpemste at artsci.wustl.edu]

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I was going over the source in src/nmath/pnorm.c and noticed a little
bug in pnorm_both (in R 1.7.0).  The else-if on line 205 covers the
entire real line.  Seems you want an &&, not an ||.  Doesn't make a big
difference (you still get a 0 or 1 from extreme starting values) but
your log refinements will always be skipped.

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Daniel Pemstein
Email: dbpemste at artsci.wustl.edu, dan at lcws.org
Web: http://www.danpemstein.com
PGP: http://www.danpemstein.com/files/pgp.txt

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