******** fig4.59 **********

	void
	zig_zig_left( splay_ptr x )
	{
		splay_ptr p, g, B, C, ggp;

		p = x->parent;
		g = p->parent;
		B = x->right;
		C = p->right;
		ggp = g->parent;

		x->right = p;		/* x's new right child is p*/
		p->parent = x;

		p->right = g;		/* p's new right child is g */
		g->parent = p;

		if( B != NULL )		/* p's new left child is subtree B */
			B->parent = p;
		p->left = B;

		if( C != NULL )		/* g's new left child is subtree C */
			C->parent = g;
		g->left = C;

		x->parent = ggp;	/* connect to rest of the tree */
		if( ggp != NULL )
			if( ggp->left == g )
				ggp->left = x;
			else
				ggp->right = x;
	}