Inside a for loop, crystal angle 'd' defaults get changed by previous iteration

[NickKarpowicz]

Accordingly, something like for(2,4){ nonlinear(4,i29,i30,d,d) nonlinear(4,v01,v02, d, d) }

will have different results than

for(2,4){ nonlinear(4,d,d,d,d) nonlinear(4,v01,v02, d, d) }