fix typo in nimbase.h
fix typo in nimbase.h

haiodo/Nim,jfhg/Nim,zachaysan/Nim,tulayang/Nim,zachaysan/Nim,tulayang/Nim,dom96/Nim,jsanjuas/Nim,singularperturbation/Nim,dom96/Nim,jsanjuas/Nim,tulayang/Nim,haiodo/Nim,mbaulch/Nim,zachaysan/Nim,zachaysan/Nim,endragor/Nim,mbaulch/Nim,jfhg/Nim,dom96/Nim,endragor/Nim,singularperturbation/Nim,tulayang/Nim,jsanjuas/Nim,endragor/Nim,dom96/Nim,endragor/Nim,haiodo/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,tulayang/Nim,jfhg/Nim,endragor/Nim,russpowers/Nim,jsanjuas/Nim,jfhg/Nim,haiodo/Nim,singularperturbation/Nim,mbaulch/Nim,singularperturbation/Nim,haiodo/Nim,zachaysan/Nim,jfhg/Nim,singularperturbation/Nim,mbaulch/Nim,haiodo/Nim,russpowers/Nim,russpowers/Nim,russpowers/Nim,mbaulch/Nim,jsanjuas/Nim,singularperturbation/Nim,endragor/Nim,mbaulch/Nim,zachaysan/Nim,haiodo/Nim,singularperturbation/Nim,jsanjuas/Nim,zachaysan/Nim,mbaulch/Nim,dom96/Nim,endragor/Nim,jfhg/Nim,jsanjuas/Nim,jfhg/Nim,tulayang/Nim