Massage an unportable autoconf test so it won't erroneously fail on alpha;

fixes crashes on alpha down the road.

misc/screen/Makefile

@@ -1,9 +1,10 @@
-# $OpenBSD: Makefile,v 1.56 2006/10/25 16:27:04 mbalmer Exp $
+# $OpenBSD: Makefile,v 1.57 2006/10/31 18:01:01 naddy Exp $
 
 COMMENT=	"multi-screen window manager"
 
 VERSION=	4.0.3
 DISTNAME=	screen-${VERSION}
+PKGNAME=	${DISTNAME}p0
 CATEGORIES=	misc
 MASTER_SITES=	ftp://ftp.uni-erlangen.de/pub/utilities/screen/
 

misc/screen/patches/patch-configure

@@ -0,0 +1,17 @@
+$OpenBSD: patch-configure,v 1.1 2006/10/31 18:01:01 naddy Exp $
+--- configure.orig	Mon Oct 30 17:48:42 2006
++++ configure	Mon Oct 30 17:49:09 2006
+@@ -7186,10 +7186,12 @@ cat confdefs.h >>conftest.$ac_ext
+ cat >>conftest.$ac_ext <<_ACEOF
+ /* end confdefs.h.  */
+ 
++#include <stdarg.h>
+ int
+ main ()
+ {
+-vsprintf(0,0,0);
++va_list ap;
++vsprintf(0,0,ap);
+   ;
+   return 0;
+ }