fix DH_generate_parameters for general 'generator'
diff --git a/crypto/dh/dhtest.c b/crypto/dh/dhtest.c
index 0176436..34894ce 100644
--- a/crypto/dh/dhtest.c
+++ b/crypto/dh/dhtest.c
@@ -117,6 +117,16 @@
 	a=DH_generate_parameters(64,DH_GENERATOR_5,cb,out);
 	if (a == NULL) goto err;
 
+	if (!DH_check(a, &i)) goto err;
+	if (i & DH_CHECK_P_NOT_PRIME)
+		BIO_puts(out, "p value is not prime\n");
+	if (i & DH_CHECK_P_NOT_SAFE_PRIME)
+		BIO_puts(out, "p value is not a safe prime\n");
+	if (i & DH_UNABLE_TO_CHECK_GENERATOR)
+		BIO_puts(out, "unable to check the generator value\n");
+	if (i & DH_NOT_SUITABLE_GENERATOR)
+		BIO_puts(out, "the g value is not a generator\n");
+
 	BIO_puts(out,"\np    =");
 	BN_print(out,a->p);
 	BIO_puts(out,"\ng    =");
@@ -175,6 +185,8 @@
 	else
 		ret=0;
 err:
+	ERR_print_errors_fp(stderr);
+
 	if (abuf != NULL) OPENSSL_free(abuf);
 	if (bbuf != NULL) OPENSSL_free(bbuf);
 	if(b != NULL) DH_free(b);