$OpenBSD: patch-src_main_session_c,v 1.4 2008/01/21 22:21:24 rui Exp $
--- src/main/session.c.orig	Fri Nov 23 13:46:52 2007
+++ src/main/session.c	Mon Jan 21 16:21:31 2008
@@ -202,7 +202,7 @@ int rad_check_ts(uint32_t nasaddr, unsigned int portnu
 	   processor to execute checkrad
 	*/
 	execl(getenv("COMSPEC"), "", "/C","checkrad", cl->nastype, address, port,
-		user, session_id, NULL);
+		user, session_id, (void *)NULL);
 #else
 	execl(mainconfig.checkrad, "checkrad", cl->nastype, address, port,
 		user, session_id, NULL);
