stack_peek

	value.g.v = stack_peek(stack.gp.r)

	This routine will return the value on of the top of a stack
	without removing it.

	stack		stack to peek

	This function requires the following include files:

	cbslib_h

	Related functions:

	stack_init, stack_push, stack_pop, stack_delete, stack_free,
	stack_is_empty

	C/C++ usage:

	void	*stack;
	void	*value;

	value = stack_peek(&stack);