[Fixed] [#15943] [2.30] Black bar on World Map

[yang20]

Hi. I've seen tiny black bar on world map. It is visible only on max zoom-out. Can find it also on freight market map (where is more visible).
Log:
Photos (its more visible on second photo):

[Trucker2223]

already reported internally by me: #15943
There are actually two stripes in it, one also goes down near Luxemburg

[Trucker2223]

Fixed in WIP