Failed upgrade of png

[Frank]

The advisory affects png < 1.2.7 so why do I get this?

Ace /usr/ports # portupgrade -Rr png
[Gathering depends for graphics/png  done]
[Gathering depends for print/ghostscript-gpl 
................................................ done]
** Port marked as IGNORE: multimedia/avifile:
         is marked as broken: Numerous compile errors under gcc 4.2
[Gathering depends for graphics/ImageMagick 
................................ done]
[Exclude up-to-date packages .................................... done]
--->  Upgrading 'png-1.2.26' to 'png-1.2.27' (graphics/png)
--->  Building '/usr/ports/graphics/png'
===>  Cleaning for png-1.2.27
===>  png-1.2.27 has known vulnerabilities:
=> png -- unknown chunk processing uninitialized memory access.
    Reference: 
<http://www.FreeBSD.org/ports/portaudit/57c705d6-12ae-11dd-bab7-0016179b2dd5.html>
=> Please update your ports tree and try again.
*** Error code 1

Stop in /usr/ports/graphics/png.
** Command failed [exit code 1]: /usr/bin/script -qa 
/tmp/portupgrade.26895.0 env UPGRADE_TOOL=portupgrade 
UPGRADE_PORT=png-1.2.26 UPGRADE_PORT_VER=1.2.26 make
** Fix the problem and try again.
--->  Skipping 'print/ghostscript-gpl' (ghostscript-gpl-8.61_4) because a 
requisite package 'png-1.2.26' (graphics/png) failed (specify -k to force)
--->  Skipping 'graphics/ImageMagick' (ImageMagick-6.3.6.9) because a 
requisite package 'png-1.2.26' (graphics/png) failed (specify -k to force)
** Listing the failed packages (-:ignored / *:skipped / !:failed)
         - multimedia/avifile (marked as IGNORE)
         ! graphics/png (png-1.2.26)     (unknown build error)
         * print/ghostscript-gpl (ghostscript-gpl-8.61_4)
         * graphics/ImageMagick (ImageMagick-6.3.6.9)
Ace /usr/ports #

-- Frank