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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Fix read_png with libpng 1.6"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=63487#c4">Comment # 4</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Fix read_png with libpng 1.6"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=63487">bug 63487</a>
              from <span class="vcard"><a class="email" href="mailto:krejzi@email.com" title="Armin K <krejzi@email.com>"> <span class="fn">Armin K</span></a>
</span></b>
        <pre>-    png_read_update_info (png, info);
+    info = NULL;
+    png_read_info (png, info);

This appears to work, too. It doesn't work without unseting the info variable.
If it's okay with you, I'll attach a new patch.</pre>
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