error running example

While running from the git master branch I get an error
** Error in if (node[[node_id]]$split$breaks) { : argument is of length zero **
```
potentialtree<-ctree(kcal24h0~., data = visTree::blsdata, control = ctree_control(mincriterion = 0.95))
visTree(potentialtree,  color.type = 1, alpha = 0.5)
``` 

