Hi Cristian,

If you have a chance to look at the following when you are at it with issue #13.

A lot of code is using methods callocStack and mallocStack. In the librairy LWJGL (3.3.1) it's been deprecated for removal in 3.4.0.

Suggested by documentation of LWJGL to use calloc() and malloc() instead.

Maybe good to make it future proof for now?