diff -r a95a2849b0e1 -r 4d8c2e5ad9fb src/network/core/udp.h
--- a/src/network/core/udp.h	Sun Jan 28 20:47:25 2007 +0000
+++ b/src/network/core/udp.h	Sun Jan 28 20:54:30 2007 +0000
@@ -120,7 +120,7 @@
 	 * the grfconfig list of the NetworkGameInfo.
 	 * @param config the GRF to handle
 	 */
-	virtual void HandleIncomingNetworkGameInfoGRFConfig(GRFConfig *config) = 0;
+	virtual void HandleIncomingNetworkGameInfoGRFConfig(GRFConfig *config) { NOT_REACHED(); }
 public:
 	/** On destructing of this class, the socket needs to be closed */
 	virtual ~NetworkUDPSocketHandler() { this->Close(); }