Make main not throw away temp objects on heap

Make main not throw away temp objects on heap

The subject says that learnMateria "Copies the Materia passed as
a parameter and store it in memory so it can be cloned later."
From that I get that learnMateria makes a copy of the Materia passed
meaning we cant use "new AMateria()" to learn it, as we have no handle
to that object to delete it.