inversion pyx, makeArcBasisParsimony() misses a case

[texadactyl]

Beginning at line 121, the if-elif needs a final else to cover the case that N (number of pixel rows) does not exceed 1. Maybe this is impossible but it would not hurt to have defensive code.

That is why the compiles emits the following warning:
warning: ‘__pyx_v_Nmid’ may be used uninitialized in this function [-Wmaybe-uninitialized]

[texadactyl]

There are similar warnings for nLimbPixelSpaces and nOpacityUnits in the same source file.

[texadactyl]

cGridFunctions gets similar complaints about variable area which could be simply initialized at the beginning of the complex set of cases that result in a calculation. Would zero (outside stellar disk) be a good default?

[texadactyl]

I hope that you find the suggested fixes that I provided for warnings to be useful. I know from years of experience that unnecessary warnings make us numb to them (potentially dangerous); that has bitten me in the past when I was younger and the tools were a bit more primitive. On the other hand, you probably would like to spend your time on Science as opposed to Programming!