psSphereRotInvert defined wrong

[Paul Price]

psSphereRotInvert is defined:

psSphereRot* psSphereRotInvert(

double alphaP, /< north pole latitude
double deltaP, /< north pole longitude
double phiP /< defines the longitude in the input

system of the equatorial intersection between the two systems (e.g, the first
point of Ares).
);

whereas it is in the SDRS as:

psSphereRot *psSphereRotInvert(psSphereRot *rot)

The SDRS version is preferred.