graphics/OpenEXR: patch for gcc46+

[Andriy Gapon]

--- exrenvmap/blurImage.cpp.orig	2012-11-23 23:23:48.714449156 +0200
+++ exrenvmap/blurImage.cpp	2012-11-23 23:24:09.765447850 +0200
@@ -45,6 +45,7 @@
 #include "Iex.h"
 #include <iostream>
 #include <algorithm>
+#include <cstring>

 using namespace std;
 using namespace Imf;

This patch is required because memcpy(3) is used in the file.

-- 
Andriy Gapon