Wrong scrolling with misplaced teletransporter on the north side of the map
Created by: christopho
If a North side-scrolling teletransporter is placed at -16,-16 instead of 0,-16, the engine scrolls wrongly and arrives to a wrong place of the destination map. It is a mistake from the user to place a teletransporter at -16,-16, but we should still correctly detect that it is a North teletransporter.