another optimization for __crand see issue #188
another optimization for __crand see issue #188

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