Trucks pick the shortest refuel route even when no path exists

Issue description

Trucks started to caclulate a shorter route to refuel while building a land bridge, to there is no path going there.

Expected behavior

Not taking the shortest route, but a possible one, which leads to a longer route but getting refueled without manually intervening.

Reproduction steps

1. building a land bridge over oil patch in curland map
2. Assigning trucks to landfill

Game version

v0.4.8

Attachments

issue1.save

Files not imported: issue1.save

This is not only about refuelling, all routes are taken by the shortest air distance sometimes leading to weird results.

This is not only about refuelling, all routes are taken by the shortest air distance sometimes leading to weird results.

It's about path finding when refueling because another station was closer than a 'shorter' router, which is not really existing.