From 6d7083eee3bc088d1fc30eefabd6263bca40c95a Mon Sep 17 00:00:00 2001
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Mon, 13 Aug 2012 11:00:08 -0400
Subject: [PATCH] xen/swiotlb: Fix compile warnings when using plain integer
 instead of NULL pointer.

arch/x86/xen/pci-swiotlb-xen.c:96:1: warning: Using plain integer as NULL pointer
arch/x86/xen/pci-swiotlb-xen.c:96:1: warning: Using plain integer as NULL pointer

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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