Fixing bug in Arc_KDTree which allowed points to be converted to XYZ multiple times.
Fixing bug in Arc_KDTree which allowed points to be converted to XYZ multiple times.

AlanZatarain/pysal,tectronics/pysal,tectronics/pysal,AlanZatarain/pysal,tectronics/pysal,Alwnikrotikz/pysal,Alwnikrotikz/pysal,AlanZatarain/pysal,Alwnikrotikz/pysal