def cull(have)
      have.subtitles.reject! { |subtitle| subtitle[:end] < 0 }
      have.subtitles.each do |subtitle|
        subtitle[:start] = 0 if subtitle[:start] < 0
      end
    end
def cull(have)
      have.subtitles.reject! { |subtitle| subtitle[:end] < 0 }
      have.subtitles.each do |subtitle|
        subtitle[:start] = 0 if subtitle[:start] < 0
      end
    end
Cleans out subtitles that fell out of the usable time range

 @params have [Have] What we {Have}