Bugfix and simplification of initial poles creation.
Bugfix and simplification of initial poles creation.

jhillairet/scikit-rf,temmeand/scikit-rf,jhillairet/scikit-rf,jhillairet/scikit-rf,temmeand/scikit-rf,temmeand/scikit-rf,scikit-rf/scikit-rf,scikit-rf/scikit-rf