DisplayProcesses function causes segmentation fault

[fabP258]

Issue description

The DisplayProcesses function from the NCursesDisplay namespace causes a segmentation fault if the size of the processes vector is smaller than the parameter n (which does not depend on the size of the vector and is 10 by default). I saw that in the updated repository this has already been fixed. But since this is the repository linked in the Udacity course it might be worth fixing it here as well.

Steps to reproduce the issue

The issue can be reproduced by returning an empty vector from System::Processes().