Airy() exits early when inputs specify derivatives of Airy functions of the first or second kind

[aromanielloNTIA]

LFMF/src/Airy.cpp

Line 476 in 895aca5

if ((kind != AIRY) &&

This seems to be a simple mistake in the C/C++ implementation, which causes the program to exit (return 0) if the kind is AIRYD or BAIRYD (derivatives of Airy functions of the first and second kind, $Ai'$ and $Bi'$).

The program otherwise seems to support these two kinds of calculations.

This bug does not impact the LF/MF model since the AIRYD and BAIRYD kinds of Airy functions are not used. However, this bug restricts the reusability of the Airy() function.