Fix a bug in rp2gen utility which segfaults on 64 bit architectures

during net/coda6_server's build.

net/coda6_server build failure reported by Kris.

Approved by:	portmgr (erwin)

devel/rpc2/Makefile

@@ -7,6 +7,7 @@
 
 PORTNAME=	rpc2
 PORTVERSION=	2.2
+PORTREVISION=	1
 CATEGORIES=	devel
 MASTER_SITES=	ftp://ftp.coda.cs.cmu.edu/pub/rpc2/src/ \
 		ftp://ftp.wu-wien.ac.at/pub/systems/coda/src/ \

devel/rpc2/files/patch-rp2gen_symtab.c

@@ -0,0 +1,15 @@
+--- rp2gen/symtab.c.orig	Fri Oct 20 09:04:36 2006
++++ rp2gen/symtab.c	Fri Oct 20 09:19:18 2006
+@@ -53,6 +53,12 @@
+ extern VAR *make_var();
+ ENTRY *find();
+ 
++/*
++ * If this is not prototyped its return value defaults to int which results
++ * in bogus results on systems where sizeof(void*) > sizeof(int).
++ */
++extern RPC2_TYPE *rpc2_struct_type(VAR **);
++
+ /* This module uses external chaining */
+ 
+ #define SYMTAB_SIZE	50