Fix Zander altitude transmission error causing overflow .
Fix AltitudeToQNHAltitude overflow when impossible altitude is requested
Fix pressure function AirDensity overflow with impossible altitude
Do not reset flight if a gps has gone back in time after takeoff..
Tune Kalman wind calculation: do not reset the matrix if airspeed is missing.
Wait for 30 minutes with no samples before resetting the matrix, too.
Ditto..
update changes
This is version 4.1n
advance to next beta