Issue description
Harvester with "No fuel" shows an additional "No trees" notification. However, that is clearly wrong. The trees are only unreachable because the harvester cannot move anymore.

Expected behavior
"No Fuel" should not cause "No Trees" for the same harvester.
However if "No Trees" occurs first, and then "No Fuel", either way looks sensible.
Reproduction steps
Let harvester run dry while there is still trees to cut within reach.
Game version
v0.4.14a(154)
Attachments
Harvester.save
Files not imported: Harvester.save