Backported from 56b5a5887349e9d0e1d28da157fe6441ca691f56

Signed-off-by: Jesper Baekdahl <jbb@gamblify.com>
---
From 56b5a5887349e9d0e1d28da157fe6441ca691f56 Mon Sep 17 00:00:00 2001
From: Jeremy Huddleston <jeremyhu@apple.com>
Date: Thu, 08 Mar 2012 19:49:36 +0000
Subject: Build fix when sizeof(off_t) > sizeof(void *)

https://trac.macports.org/ticket/33532

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
---
diff --git a/src/XF86DGA2.c b/src/XF86DGA2.c
index e81b486..32f455b 100644
--- a/src/XF86DGA2.c
+++ b/src/XF86DGA2.c
@@ -928,7 +928,7 @@ DGAMapPhysical(
     if ((pMap->fd = open(name, O_RDWR)) < 0)
 	return False;
     pMap->virtual = mmap(NULL, size, PROT_READ | PROT_WRITE,
-			MAP_FILE | MAP_SHARED, pMap->fd, (off_t)base);
+			MAP_FILE | MAP_SHARED, pMap->fd, (off_t)(uintptr_t)base);
     if (pMap->virtual == (void *)-1)
 	return False;
     mprotect(pMap->virtual, size, PROT_READ | PROT_WRITE);
--
cgit v0.9.0.2-2-gbebe