Make return value from EVP_PKEY_cmp() and EVP_PKEY_cmp_parameters() consistent.

crypto/evp/p_lib.c

@@ -161,11 +161,20 @@ int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 	if (a->type != b->type)
 		return -1;
 
-	if (EVP_PKEY_cmp_parameters(a, b) == 0)
-		return 0;
-
-	if (a->ameth && a->ameth->pub_cmp)
-		return a->ameth->pub_cmp(a, b);
+	if (a->meth)
+		{
+		int ret;
+		/* Compare parameters if the algorithm has them */
+		if (a->meth->param_cmp)
+			{
+			ret = a->meth->param_cmp(a, b);
+			if (ret <= 0)
+				return ret;
+			}
+
+		if (a->ameth->pub_cmp)
+			return a->ameth->pub_cmp(a, b);
+		}
 
 	return -2;
 	}