better log for "Check max_depth and num_leaves" (#931)
better log for "Check max_depth and num_leaves" (#931)

* better log for "Check max_depth and num_leaves"

The default log said "[LightGBM] [Warning] Accuarcy may be bad since you didn't set num_leaves." but the case max_depth²>num_leaves could also trigger this log.
Correction of a typo too : Accuarcy > Accuracy

* Update config.cpp

olofer/LightGBM,henry0312/LightGBM,microsoft/LightGBM,Allardvm/LightGBM,Allardvm/LightGBM,microsoft/LightGBM,Allardvm/LightGBM,henry0312/LightGBM,olofer/LightGBM,Laurae2/LightGBM,henry0312/LightGBM,microsoft/LightGBM,olofer/LightGBM,wxchan/LightGBM,henry0312/LightGBM,Allardvm/LightGBM,Laurae2/LightGBM,wxchan/LightGBM,olofer/LightGBM,microsoft/LightGBM,Laurae2/LightGBM,Laurae2/LightGBM,henry0312/LightGBM,Laurae2/LightGBM,wxchan/LightGBM,wxchan/LightGBM,wxchan/LightGBM,olofer/LightGBM,microsoft/LightGBM,Allardvm/LightGBM