ipa-prop.c (ipa_vr_ggc_hash_traits::hash): Hash p->min and p->max as pointers rather than using iterative_hash_expr.

	* ipa-prop.c (ipa_vr_ggc_hash_traits::hash): Hash p->min and
	p->max as pointers rather than using iterative_hash_expr.

From-SVN: r257940