Fix calculation for GetTDryBulbFromEnthalpyAndHumRatio

[SimoneAragno]

Error in formula substitue division by multiplication

[schnepe2]

As far as I can see (and calculate 😉 ) neither division nor multiplication is needed:
From the enthalpy formula[*]:
h = 1.006 * Tdb + W * (2501 + 1.86 * Tdb)[**]
...I get (by solving for Tdb)...
Tdb = (h - 2501.0 * W) / (1.006 + 1.86 * W).

So the code should be :
GetTDryBulbFromEnthalpyAndHumRatio = (MoistAirEnthalpy - 2501.0 * HumRatio) / (1.006 + 1.86 * HumRatio)

And by the way: The fix should be applied to all languages 😉

Hopefully I did not make even more mistakes - would be embarrassing 😊

[*] from here for example
[**] with units for h [kJ/kg], Tdb [°C] and W [kg/kg]