ports/145128: games/vavoom: fix build for png-1.4.1

[barbara]

The following reply was made to PR ports/145128; it has been noted by GNATS.

From: "barbara" <barbara.xxx1975 at libero.it>
To: "bug-followup" <bug-followup at FreeBSD.org>
Cc:  
Subject: Re: ports/145128: games/vavoom: fix build for png-1.4.1
Date: Mon, 29 Mar 2010 01:23:35 +0200

 Ok, the patch is here:
 http://pastebin.com/wEY5Y07w