Fix movement function issues and division by zero in aircraft velocity#13

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Copilot wants to merge 3 commits intomasterfrom

copilot/fix-movement-function-issues

Commits on Jan 12, 2026

Initial plan
Copilot
committed
Fix AdvancedDriveLocomotionClass::Is_Moving_Now() to properly check movement state

Copilot
and
deathreaperz
committed
Fix division by zero in aircraft velocity calculation when cosine is near zero

Copilot
and
deathreaperz
committed