Fix zlib ffi driver on 32-bit big endian platforms. Fixes gem

installation on macppc.  Thanks to ajacoutot@ for access to a macppc
machine.

OK ajacoutot@, jasper@

lang/rubinius/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.7 2011/01/13 00:21:03 jeremy Exp $
+# $OpenBSD: Makefile,v 1.8 2011/01/21 16:36:53 jeremy Exp $
 
 SHARED_ONLY=	Yes
 
@@ -7,7 +7,7 @@ COMMENT =	Ruby virtual machine and core library
 V=		1.2.0
 DISTNAME =	rubinius-${V}-20101221
 PKGNAME =	rubinius-$V
-REVISION =	2
+REVISION =	3
 
 CATEGORIES =	lang lang/ruby
 

lang/rubinius/patches/patch-lib_zlib_rb_ffi

@@ -0,0 +1,23 @@
+$OpenBSD: patch-lib_zlib_rb_ffi,v 1.1 2011/01/21 16:36:53 jeremy Exp $
+
+OpenBSD uses off_t instead of unsigned long for the total_in and
+total_out struct members, so it works on files >4GB.  Rubinius has
+harcoded ulong instead of checking, as ulong is what most other
+OSes use.
+
+--- lib/zlib.rb.ffi.orig	Thu Jan 20 11:45:11 2011
++++ lib/zlib.rb.ffi	Thu Jan 20 11:45:15 2011
+@@ -245,11 +245,11 @@ module Zlib
+         s.name "struct z_stream_s"
+         s.field :next_in,   :pointer
+         s.field :avail_in,  :uint
+-        s.field :total_in,  :ulong
++        s.field :total_in,  :off_t
+ 
+         s.field :next_out,  :pointer
+         s.field :avail_out, :uint
+-        s.field :total_out, :ulong
++        s.field :total_out, :off_t
+ 
+         s.field :msg,       :string
+         s.field :state,     :pointer