$NetBSD: patch-ar,v 1.1 2007/10/10 16:57:25 rillig Exp $

--- ncp/channel.h.orig	1999-04-12 21:16:50.000000000 +0000
+++ ncp/channel.h	2007-10-10 16:55:19.000000000 +0000
@@ -15,11 +15,11 @@ public:
 
   void setNcpChannel(int chan);
   void ncpSend(bufferStore &a);
-  virtual void ncpDataCallback(bufferStore &a) = NULL;
-  virtual const char *getNcpConnectName() = NULL;
+  virtual void ncpDataCallback(bufferStore &a) = 0;
+  virtual const char *getNcpConnectName() = 0;
   void ncpConnect();
-  virtual void ncpConnectAck() = NULL;
-  virtual void ncpConnectTerminate() = NULL;
+  virtual void ncpConnectAck() = 0;
+  virtual void ncpConnectTerminate() = 0;
   void ncpDisconnect();
 
   // The following two calls are used for destructing an instance