fix @setModels when models are empty
fix @setModels when models are empty

pandoraui/backbone-react-component,fifigyuri/backbone-react-component,gengue/backbone-react-component,wushuyi/backbone-react-component,guke001/backbone-react-component,pandoraui/backbone-react-component,gengue/backbone-react-component,wushuyi/backbone-react-component,ronlobo/backbone-react-component,magalhas/backbone-react-component,visigoth/backbone-react-component