fix future
fix future

#ready? returned `false` for #set called with `nil` or `false`

iNecas/dynflow,iNecas/dynflow,ares/dynflow,jlsherrill/dynflow,Dynflow/dynflow,ares/dynflow,jlsherrill/dynflow,dLobatog/dynflow,ares/dynflow,adamruzicka/dynflow,adamruzicka/dynflow,daviddavis/dynflow,xprazak2/dynflow,adamruzicka/dynflow,adamruzicka/dynflow,dLobatog/dynflow,Dynflow/dynflow,daviddavis/dynflow,dLobatog/dynflow,Dynflow/dynflow,daviddavis/dynflow,dLobatog/dynflow,xprazak2/dynflow,daviddavis/dynflow,Dynflow/dynflow