list->free (ul_oocbs)

	free(list.s.r)

	This method is used to free all dynamic memory allocated by the
	List, effectively deleting all entries on the List, and setting
	its length to zero.

	list              a pointer to the list (structure of type List)

	This function returns:

	nothing

	Use of this class requires the following header files:

	list.h

	Related functions:

	create_List()     the constructor for instances of the List class

	C/C++ usage:

	#include "list.h"
	List	*list;

	(*list->free)(list);