LC: Hovering minimap while chart has no data makes red lines in get dataArray

[angiehjort]

http://www.localhost:4200/tools/#$model$markers$line$data$filter$dimensions$country$country$/$in@=som;;;;;;&encoding$y$data$concept=literacy_rate_adult_total_percent_of_people_ages_15_and_above&space@=country&=time;;&scale$type:null;;;;;;&chart-type=linechart&url=v1