fix #219 - statistics plugin empty vs. 0 values issue
fix #219 - statistics plugin empty vs. 0 values issue

qixiaobo/saiku-self,hengyuan/saiku,dasbh/saiku,brenopolanski/saiku-ui,wwf830527/saiku,wwf830527/saiku,customme/saiku,wwf830527/saiku,qqming113/saiku,newenter/saiku,qqming113/saiku,devgateway/ccrs-saiku,NAUMEN-GP/saiku,witcxc/saiku,bisone/saiku,bisone/saiku,qixiaobo/saiku-self,bisone/saiku,customme/saiku,witcxc/saiku,bisone/saiku,standino/saiku,OSBI/saiku,customme/saiku,dasbh/saiku,wtstengshen/saiku,qqming113/saiku,dasbh/saiku,standino/saiku,wtstengshen/saiku,witcxc/saiku,bisone/saiku,hengyuan/saiku,OSBI/saiku,qqming113/saiku,NAUMEN-GP/saiku,dasbh/saiku,standino/saiku,OSBI/saiku-ui,dasbh/saiku,wtstengshen/saiku,wtstengshen/saiku,standino/saiku,devgateway/ccrs-saiku,hengyuan/saiku,NAUMEN-GP/saiku,devgateway/ccrs-saiku,dasbh/saiku,OSBI/saiku-ui,devgateway/ccrs-saiku,pstoellberger/saiku-ui,qqming113/saiku,zegang/saiku,newenter/saiku,zegang/saiku,wwf830527/saiku,zegang/saiku,devgateway/ccrs-saiku,NAUMEN-GP/saiku,OSBI/saiku,wtstengshen/saiku,zegang/saiku,NAUMEN-GP/saiku,OSBI/saiku,qixiaobo/saiku-self,qqming113/saiku,OSBI/saiku,bisone/saiku,qixiaobo/saiku-self,newenter/saiku,hengyuan/saiku,pstoellberger/saiku-ui,brenopolanski/saiku-ui,newenter/saiku,zegang/saiku,wtstengshen/saiku,customme/saiku,GermainSIGETY/sauceDallas-saiku3-ui,wwf830527/saiku,standino/saiku,standino/saiku,devgateway/ccrs-saiku,zegang/saiku