Skip a curve with generator of non-prime order.

Submitted by: Nils Larsch

crypto/ecdsa/ecdsatest.c

@@ -331,6 +331,8 @@ int test_builtin(BIO *out)
 		unsigned char dirt, offset;
 
 		nid = curves[n].nid;
+		if (nid == NID_ipsec4)
+			continue;
 		/* create new ecdsa key (== EC_KEY) */
 		if ((eckey = EC_KEY_new()) == NULL)
 			goto builtin_err;