Fixing sample files

[Walter Bright via Digitalmars-d]

On 4/12/2017 1:30 PM, Basile B. wrote:
> Since dmd is shipped with DUB one can just put some embedded SDL descriptions
> and put undead as dependency.

Better to just fix them.

> A bit off topic but all these examples are very old-fashioned imho. Everything
> could be replaced with more idiomatic D code, using phobos.

If you're willing to do it?