Fixed segfault on specifying a dir to process from cli
Fixed segfault on specifying a dir to process from cli

gitkaste/ncdu,guns/ncdu,rofl0r/ncdu,FauxFaux/ncdu,guns/ncdu,FauxFaux/ncdu,gitkaste/ncdu,sunny256/ncdu,rofl0r/ncdu,sunny256/ncdu,ppetr/ncdu,ppetr/ncdu,piyo/ncdu,guns/ncdu,ppetr/ncdu