From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Mon, 21 Jan 2013 19:55:26 +0000 (+0100)
Subject: Use NULL instead of png_voidp_NULL.
X-Git-Tag: 1.0~149^2~9
X-Git-Url: https://git.sesse.net/?p=movit;a=commitdiff_plain;h=c7e57f5c9fbc1b58d450557cfbffe60480bdd6b7;hp=c7e57f5c9fbc1b58d450557cfbffe60480bdd6b7

Use NULL instead of png_voidp_NULL.

Fixes a compile error on OS X, reportedly.
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