[Resolved 0.2.8] Demo 02 checking for coal only in inserter

[mindreader]

Adding wood instead of coal is NOT considered as "fuel adding". Script stopped, untill coal is added in to inserter.

[kovarex]

Thx for report.
Now I check the energy in the inserter instead of the burner inventory (So you can add other stuff, like chest there).
This also works better, as it works even if you add one piece that is consumed immediately.