Fox-Glynn but in lambda levels for lambda > 400

[ivan.zapreev]

This bug was reported by Dr. David N. Jansen

src/algorithms/foxglynn.c contains an error. Line 119 reads:

if(lambda > lambda_400)

lambda_max = lambda_400;

but it should be:

if(lambda < lambda_400)

lambda_max = lambda_400;

Reason: In the Fox Glynn 1988 article, section 3 says that if lambda < 400.0, one should find the right truncation point as if lambda were == 400.0.

[nguyen]

Fixed in r272