Kube config context without current-context causes error

[wmuizelaar]

Hi,
I updated all my python-modules to the latest versions, and therefore powerline-kubernetes was updated as well.

I use minkube to start (and stop) clusters locally, and when you stop minikube, it sets the current-context in the kube-config file to current-context: ""

Powerline-kubernetes cannot handle that very well, and gives me this error-message:
2019-12-28 17:55:16,301:ERROR:shell:kubernetes:Invalid kube-config file. Expected key current-context in kube-config

Is it possible to silence this error? Or just not let it error, but just act the same is if there wasn't a kube-config file available to read?