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


lixun910/pysal,pastephens/pysal,darribas/pysal,nathania/pysal,pysal/pysal,badjr/pysal,dfolch/pysal,dfolch/pysal,ljwolf/pysal,pastephens/pysal,sjsrey/pysal_core,hasecbinusr/pysal,schmidtc/pysal,ljwolf/pysal,lixun910/pysal,weikang9009/pysal,nathania/pysal,ljwolf/pysal,lixun910/pysal,hasecbinusr/pysal,spreg-git/pysal,darribas/pysal,schmidtc/pysal,sjsrey/pysal_core,sjsrey/pysal_core,chhao91/pysal,hasecbinusr/pysal,TaylorOshan/pysal,lanselin/pysal,sjsrey/pysal,pedrovma/pysal,TaylorOshan/pysal,TaylorOshan/pysal,jlaura/pysal,jlaura/pysal,badjr/pysal,jlaura/pysal,ljwolf/pysal_core,ljwolf/pysal_core,chhao91/pysal,pastephens/pysal,spreg-git/pysal,ljwolf/pysal_core