define the incredible FLAWLESSCALL macro in one place

sys/rump/librump/rumpdev/rump_dev_private.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: rump_dev_private.h,v 1.10 2010/03/01 13:12:20 pooka Exp $	*/
+/*	$NetBSD: rump_dev_private.h,v 1.11 2010/03/25 19:54:19 pooka Exp $	*/
 
 /*
  * Copyright (c) 2009 Antti Kantee.  All Rights Reserved.
@@ -39,4 +39,11 @@ struct mainbus_attach_args {
 	int maa_unit;
 };
 
+#define FLAWLESSCALL(call)						\
+do {									\
+	int att_error;							\
+	if ((att_error = call) != 0)					\
+		panic("\"%s\" failed", #call);				\
+} while (/*CONSTCOND*/0)
+
 #endif /* _SYS_RUMP_DEV_PRIVATE_H_ */