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Summary
SUMMARY: None
Purpose of change
Fix #44045 (most likely)
Describe the solution
Buying fuel from the terminal swaps the gas pump for null terrain, then puts
fuel on tile, then swaps terrain back to gas pump. When fuel is put on null terrain
there's no LIQUIDCONT flag on the tile so it receives DIRTY flag.
Then a few vehicle functions disagree on handling flag differences which is why
there's the debug popup in the linked issue - but that needs another PR to fix.
For now this patch removes terrain swapping and puts LIQUIDCONT on non-broken
gas pumps which prevents DIRTY flag.
Describe alternatives you've considered
Testing
Spawn gas station special with terminals to buy more fuel.
Spill all fuel out of the pumps
Buy more fuel - the fuel should have no dirty flag, should refuel and stack in tanks with other fuel of same type
Additional context