Error always Inf. when using GKL

[JSybrandt]

Hello, I am trying to evaluate libmf, but when I use the GLK NNMF flags, I notice that no matter how I tune the parameters, I always get inf. for both the loss function and the error.

[wschin]

A possible reason is that a coordinate is updated to 0 and log(0) leads to numerical error. A solution is to add a small positive number after each update for GKL.