DAYKM kma calculation

[tjc181]

The calculation of kma in DAYKM appears to have a problem with order of operations.

37   KMA = KARMAN * USTAR * ZA * ( 1 - ( 15 * ZA / MOL ) )**0.25

ZA is a constant, = 50.0
MOL is a constant, = 0.4

1-(15*ZA/MOL) = -1874

Raising this to the 0.25 power produces a complex result which we try to store in a real. Context suggests a complex result is not what is intended.

[tjc181]

This ended up being a problem with the integers in the calculation. Changing 1 and 15 to 1.0 and 15.0 corrects the NaN calculation and produces a result.