(krb5_sendto_kdc): no data returned means no contact?

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@3541 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/krb5/send_to_kdc.c

@@ -220,7 +220,7 @@ krb5_sendto_kdc (krb5_context context,
 		     ret = send_and_recv (fd, context->kdc_timeout, 1,
 					  send, receive);
 		 close (fd);
-		 if(ret == 0)
+		 if(ret == 0 && receive->length != 0)
 		     goto out;
 	     }
 	 }