Fix LDRotary incorrect tas calculation
But we should not use tas in any case inside LDRotary, todo.
French Translation from Romaric
fix Mistake inside commit bb35e1e49a9305c1d3189c24b62d7c0f829e2d5d
  check division by 0 is wrong
Fix calculation of airspeedestimated and etas, using only gps altitude.
We should check (todo) if we have baro altitude available, and use the pressure altitude at 1013.25 in case.
fix airdensity use in TaskSpeed and Parser
Merge branch 'LDRotary' of https://github.com/brunotl/LK8000
Merge branch 'French' of https://github.com/brunotl/LK8000
Fix simulator nor sinking in the air at correct sink rate
using IAS instead of TAS.