From 2a452cd98c9a70747ad6474c22f5444b53bbac3c Mon Sep 17 00:00:00 2001
From: Guilhem Lavaux <guilhem.lavaux@laposte.net>
Date: Fri, 2 Nov 2012 11:35:09 -0400
Subject: [PATCH] Made Cairo optional. drawVoids is not built if Cairo is not
 found.