Fix initialize by precondition. pi_ and lambda_ are init from the same argument.
Fix initialize by precondition. pi_ and lambda_ are init from the same argument.

Signed-off-by: Godai Azuma <0f0eab2b3ee7eed768c2dfe49c6ee6c6ec6e6a5d@gmail.com>

godai0519/BayesianNetwork