Wind frequencies using 'Site.P' breaks Site.plot_ws_distribution
When windspeed probabilities in the Site class ('P' field) are used together with LocalWind, this if-condition makes sure that the reference ws of the 'P' field are the same as the LocalWind dataset.
However, when using the Site.plot_ws_distribution, LocalWind is called with a hardcoded ws-range. This hard coded ws-range, will violate the condition mentioned above, which makes the Site.plot_ws_distribution method break, when used with the Site.P field.
Maybe we could have a kwarg ('ws=') on Site.plot_ws_distribution to override the ws-range ?