fix matrix column selection in predict.mclogit if there is only one predictor left.

melff / mclogit

mclogit: Multinomial Logit Models, with or without Random Effects or Overdispersion

http://melff.github.io/mclogit/

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Closed sfahnens closed 5 years ago

sfahnens commented 6 years ago

Without drop=FALSE column selection for a single predictor returns a simple vector, which is unsuitable for the multiplication in the next line.

carljv commented 5 years ago

@melff Would be great to merge this PR. I just got bit by this bug today. Thanks!